-3a+7=-2a-5.

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Solution for -3a+7=-2a-5. equation: 



-3a+7=-2a-5.

We move all terms to the left:

-3a+7-(-2a-5.)=0

We add all the numbers together, and all the variables

-3a-(-2a-5)+7=0

We get rid of parentheses

-3a+2a+5+7=0

We add all the numbers together, and all the variables

-1a+12=0

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

-a=-12

a=-12/-1

a=+12

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