-3a+20+6a=5a-7a

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Solution for -3a+20+6a=5a-7a equation: 



-3a+20+6a=5a-7a

We move all terms to the left:

-3a+20+6a-(5a-7a)=0

We add all the numbers together, and all the variables

-3a+6a-(-2a)+20=0

We add all the numbers together, and all the variables

3a-(-2a)+20=0

We get rid of parentheses

3a+2a+20=0

We add all the numbers together, and all the variables

5a+20=0

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

5a=-20

a=-20/5

a=-4

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