15=2a-7

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Solution for 15=2a-7 equation: 



15=2a-7

We move all terms to the left:

15-(2a-7)=0

We get rid of parentheses

-2a+7+15=0

We add all the numbers together, and all the variables

-2a+22=0

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

-2a=-22

a=-22/-2

a=+11

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