a-15=4a+-3

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Solution for a-15=4a+-3 equation: 



a-15=4a+-3

We move all terms to the left:

a-15-(4a+-3)=0

We add all the numbers together, and all the variables

a-(4a-3)-15=0

We get rid of parentheses

a-4a+3-15=0

We add all the numbers together, and all the variables

-3a-12=0

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

-3a=12

a=12/-3

a=-4

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