7-2(a+3)=-9

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Solution for 7-2(a+3)=-9 equation: 



7-2(a+3)=-9

We move all terms to the left:

7-2(a+3)-(-9)=0

We add all the numbers together, and all the variables

-2(a+3)+16=0

We multiply parentheses

-2a-6+16=0

We add all the numbers together, and all the variables

-2a+10=0

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

-2a=-10

a=-10/-2

a=+5

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