15-4a=31-8a

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Solution for 15-4a=31-8a equation: 



15-4a=31-8a

We move all terms to the left:

15-4a-(31-8a)=0

We add all the numbers together, and all the variables

-4a-(-8a+31)+15=0

We get rid of parentheses

-4a+8a-31+15=0

We add all the numbers together, and all the variables

4a-16=0

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

4a=16

a=16/4

a=4

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