-9=4-2a-7

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Solution for -9=4-2a-7 equation: 



-9=4-2a-7

We move all terms to the left:

-9-(4-2a-7)=0

We add all the numbers together, and all the variables

-(-2a-3)-9=0

We get rid of parentheses

2a+3-9=0

We add all the numbers together, and all the variables

2a-6=0

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

2a=6

a=6/2

a=3

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