3a-7=15a

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Solution for 3a-7=15a equation: 



3a-7=15a

We move all terms to the left:

3a-7-(15a)=0

We add all the numbers together, and all the variables

-12a-7=0

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

-12a=7

a=7/-12

a=-7/12

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