-7+a-2a=6a-28

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Solution for -7+a-2a=6a-28 equation: 



-7+a-2a=6a-28

We move all terms to the left:

-7+a-2a-(6a-28)=0

We add all the numbers together, and all the variables

-1a-(6a-28)-7=0

We get rid of parentheses

-1a-6a+28-7=0

We add all the numbers together, and all the variables

-7a+21=0

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

-7a=-21

a=-21/-7

a=+3

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