3a+13=5a-7

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Solution for 3a+13=5a-7 equation: 



3a+13=5a-7

We move all terms to the left:

3a+13-(5a-7)=0

We get rid of parentheses

3a-5a+7+13=0

We add all the numbers together, and all the variables

-2a+20=0

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

-2a=-20

a=-20/-2

a=+10

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