-7=2a+9

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Solution for -7=2a+9 equation: 



-7=2a+9

We move all terms to the left:

-7-(2a+9)=0

We get rid of parentheses

-2a-9-7=0

We add all the numbers together, and all the variables

-2a-16=0

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

-2a=16

a=16/-2

a=-8

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