1. ## Danm Math...

So... I got some stuff as math homework. Anyone got a clue?
Need to write this simpler removing the brackets.

2(a-3)+5(a+31)

Need to write it down more easily , teacher isn't a big help.. Since i saw some ppl posting they like math i figured i'd ask

Don't really need the awnser, just a way to solve these questions

2. Teachers are always not a big help

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SammyDoge1 (03-18-2014)

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SammyDoge1 (03-18-2014)

5. 2(a-3)+5(a+31)=
(2a -6) + (5a + 155)=
2a + 5a -6 + 155=
7a + 149.
You're really 17? :\
I'm not trying to offend but i'm 17 and that's 7th grade math for me :\

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Doc (03-18-2014),SammyDoge1 (03-18-2014),ScotiaBhoysAlt (03-18-2014)

7. Originally Posted by √ince
I don't understand your question. Can you rephrase it please? Normally I'd be able to do it.
Well made one in class, this was the right awnser dont ask me how i did it.

How do i solve such problems?
It has to be made shorter and remove the (...) So it becomes a simple sum like 7a+149 << the correct awnser on the question.

8. Originally Posted by SammyDoge1

Well made one in class, this was the right awnser dont ask me how i did it.

How do i solve such problems?
It has to be made shorter and remove the (...) So it becomes a simple sum like 7a+149 << the correct awnser on the question.
Distribute and add like terms. This is like pre-algebra...

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SammyDoge1 (03-18-2014)

10. That question is way easy.

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Darakath (03-19-2014),SammyDoge1 (03-18-2014)

12. Originally Posted by Youtro
2(a-3)+5(a+31)=
(2a -6) + (5a + 155)=
2a + 5a -6 + 155=
7a + 149.
You're really 17? :\
I'm not trying to offend but i'm 17 and that's 7th grade math for me :\
Maybe for you, but i suck at math, I just don't get how you do that(the steps to follow). Could you give me the steps to walk tho, so i maybe can understand how your doing it?
Originally Posted by CaT-
That question is way easy.
Maybe for you, not everyone is equally good at math you know.

13. Originally Posted by SammyDoge1

Well made one in class, this was the right awnser dont ask me how i did it.

How do i solve such problems?
It has to be made shorter and remove the (...) So it becomes a simple sum like 7a+149 << the correct awnser on the question.
You can always vm/pm me if you don't understand something, and guys^ not everyone is good at maths. If he has trouble doing it then he needs to get it explained well. I can always help someone, especially when we speak the same language.

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SammyDoge1 (03-18-2014)

15. Originally Posted by SammyDoge1

Maybe for you, but i suck at math, I just don't get how you do that(the steps to follow). Could you give me the steps to walk tho, so i maybe can understand how your doing it?

Maybe for you, not everyone is equally good at math you know.
Do you know your order of operations? PEMDAS (Parentheses -> Exponents -> Multiplication -> Division -> Addition -> Substract).

Equation: 2(a-3)+5(a+31)

2(a-3) means multiply everything in the parenthethes by 2. You have distribute that 2 to everything inside of the parentheses
2 * a = 2a
2 * -3 = -6

So now you're left with: 2a - 6 + 5(a + 31)

Once again, 5(a - 31) means multiply everything in the parentheses by 5. Remember distribute a.k.a. FOIL (First-> Inner-> Outer-> Last)!
5 * a = 5a
5 * 31 = 155

So now you're left with: 2a - 6 + 5a - 155

Simplify and combine like terms:
2a + 5a = 7a
-6 + 155 = 149

Here's a video that should explain it very well:

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SammyDoge1 (03-19-2014)

17. Originally Posted by √ince
You can always vm/pm me if you don't understand something, and guys^ not everyone is good at maths. If he has trouble doing it then he needs to get it explained well. I can always help someone, especially when we speak the same language.
Exactly.

Originally Posted by CaT-
That question is way easy.
Enlighten me on how to solve such questions.

18. Originally Posted by Woodhouse

Do you know your order of operations? PEMDAS. Parenthethis -> Exponents -> Multiplication -> Division -> Addition -> Substract
2(a-3)+5(a+31)

2(a-3) means multiply everything in the parenthethis by 2. You have distribute that 2 to everything in the paranthesis.

2 * a = 2a
2 * -3 = -6

So now you're left with: 2a - 6 + 5(a + 31)

Once again, 5(a - 31) means multiply everything in the paranthesis by 5. Remember distribute a.k.a. FOIL (First-> Inner-> Outer-> Last)!

5 * a = 5a
5 * 31 = 155

So now you're left with: 2a - 6 + 5a - 155

Simplify and combine like terms:

2a +5a = 7a

-6 +155 = 149

Here's a video that should explain it very well:

Omg <3 Thankyou So much, it actualy shows me how its done, so you just multiply the number outside the () with the numbers inside?

So, 3(2a+7) will become 6a+21?

If im correct?

19. Originally Posted by SammyDoge1

Omg <3 Thankyou So much, it actualy shows me how its done, so you just multiply the number outside the () with the numbers inside?

So, 3(2a+7) will become 6a+21?

If im correct?
Yes. You are correct. Distribute the outside term with ALL terms inside of the parentheses. The outside number isn't always just a number, but the same principal applies e.g.

2x(a² + -4a + 4) =
2xa² - 8xa + 8x

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SammyDoge1 (03-18-2014)

21. 2(a+b)=2a + 2b.
Pathetic

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SammyDoge1 (03-18-2014)

23. Originally Posted by Woodhouse

Yes. You are correct. Distribute the outside term with ALL terms inside of the parentheses. The outside number isn't always just a number, but the same principal applies e.g.

2x(a² + -4a + 4) =
2xa² - 8xa + 8x

Cool Cool, Thanks for the explanation! Think i get it now.

Originally Posted by Youtro
2(a+b)=2a + 2b.
Pathetic
Lol, Its kinda hard to understand if you get 2(a-3)+5(a+31) And the awnser from the teacher, without any explanation.. If you'd told me it in this way, i would have come a far way. thanks i guess..

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