3a=-a+20

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Solution for 3a=-a+20 equation: 



3a=-a+20

We move all terms to the left:

3a-(-a+20)=0

We add all the numbers together, and all the variables

3a-(-1a+20)=0

We get rid of parentheses

3a+1a-20=0

We add all the numbers together, and all the variables

4a-20=0

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

4a=20

a=20/4

a=5

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