7a+2(4a-5)=-100

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Solution for 7a+2(4a-5)=-100 equation: 



7a+2(4a-5)=-100

We move all terms to the left:

7a+2(4a-5)-(-100)=0

We add all the numbers together, and all the variables

7a+2(4a-5)+100=0

We multiply parentheses

7a+8a-10+100=0

We add all the numbers together, and all the variables

15a+90=0

We move all terms containing a to the left, all other terms to the right

15a=-90

a=-90/15

a=-6

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