a-15=4a-4

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



a-15=4a-4

We move all terms to the left:

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

We get rid of parentheses

a-4a+4-15=0

We add all the numbers together, and all the variables

-3a-11=0

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

-3a=11

a=11/-3

a=-3+2/3

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