22=15+7a

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Solution for 22=15+7a equation: 



22=15+7a

We move all terms to the left:

22-(15+7a)=0

We add all the numbers together, and all the variables

-(7a+15)+22=0

We get rid of parentheses

-7a-15+22=0

We add all the numbers together, and all the variables

-7a+7=0

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

-7a=-7

a=-7/-7

a=1

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