-3a+5=a-15

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Solution for -3a+5=a-15 equation: 



-3a+5=a-15

We move all terms to the left:

-3a+5-(a-15)=0

We get rid of parentheses

-3a-a+15+5=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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