4a-15=3+7a

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Solution for 4a-15=3+7a equation: 



4a-15=3+7a

We move all terms to the left:

4a-15-(3+7a)=0

We add all the numbers together, and all the variables

4a-(7a+3)-15=0

We get rid of parentheses

4a-7a-3-15=0

We add all the numbers together, and all the variables

-3a-18=0

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

-3a=18

a=18/-3

a=-6

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