2a+12=7a-3

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Solution for 2a+12=7a-3 equation: 



2a+12=7a-3

We move all terms to the left:

2a+12-(7a-3)=0

We get rid of parentheses

2a-7a+3+12=0

We add all the numbers together, and all the variables

-5a+15=0

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

-5a=-15

a=-15/-5

a=+3

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