7=1+2a+2

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Solution for 7=1+2a+2 equation: 



7=1+2a+2

We move all terms to the left:

7-(1+2a+2)=0

We add all the numbers together, and all the variables

-(2a+3)+7=0

We get rid of parentheses

-2a-3+7=0

We add all the numbers together, and all the variables

-2a+4=0

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

-2a=-4

a=-4/-2

a=+2

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