3a-20=2a-7

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Solution for 3a-20=2a-7 equation: 



3a-20=2a-7

We move all terms to the left:

3a-20-(2a-7)=0

We get rid of parentheses

3a-2a+7-20=0

We add all the numbers together, and all the variables

a-13=0

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

a=13

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