May someone teach me how to solve a problem so that I may continue the rest of my studying with the knowledge to do so? Here is the problem:

(7a+3)-(5a+9)

Thank you! I know back finding x problems however I am not completely sure how to solve this.

Question

May someone teach me how to solve a problem so that I may continue the rest of my studying with the knowledge to do so? Here is the problem: 

(7a+3)-(5a+9)

Thank you! I know back finding x problems however I am not completely sure how to solve this.

anonymous · Answer

yes first open the brackets

cydney_morgan · Answer

So it will be just 7a+3-5a+9?

anonymous · Answer

7a+3-5a-9

anonymous · Answer

you can multiply numbers with the same variable.

anonymous · Answer

when u multiply by negative sign then negative multiplied by negative becomes positive

cydney_morgan · Answer

I'm a little bit confused, What exactly do I multiply?

anonymous · Answer

(7a+3)-(5a+9)
7a*5a)(3+9

cydney_morgan · Answer

OH okay

cydney_morgan · Answer

Let me give it a try by solving it from here.

anonymous · Answer

answer will be 2a-6

jim_thompson5910 · Answer

(7a+3)-(5a+9) turns into 7a+3-5a-9

notice how the (5a+9) turns into -5a-9

the signs of EVERY term inside swapped (from positive to negative)

anonymous · Answer

(7a+3)-(5a+9)
7a*5a)(3+9
|              |
35a   -   12

cydney_morgan · Answer

How did I wind up with 35a)(12 ? Gahh let me think

anonymous · Answer

then divide them

anonymous · Answer

jim is telling the right way of doing it like me orwel is wrong

anonymous · Answer

35a/12

cydney_morgan · Answer

I'm confused now

cydney_morgan · Answer

You cant divide 35 and somehow make it 2 right? I think?

jim_thompson5910 · Answer

you can write (7a+3)-(5a+9) like this

|dw:1421298197991:dw|