7-(2a+3)=12

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Solution for 7-(2a+3)=12 equation: 



7-(2a+3)=12

We move all terms to the left:

7-(2a+3)-(12)=0

We add all the numbers together, and all the variables

-(2a+3)-5=0

We get rid of parentheses

-2a-3-5=0

We add all the numbers together, and all the variables

-2a-8=0

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

-2a=8

a=8/-2

a=-4

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