2a+3=7a-12

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



2a+3=7a-12

We move all terms to the left:

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

We get rid of parentheses

2a-7a+12+3=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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