7a-3+2a=4a+12

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Solution for 7a-3+2a=4a+12 equation: 



7a-3+2a=4a+12

We move all terms to the left:

7a-3+2a-(4a+12)=0

We add all the numbers together, and all the variables

9a-(4a+12)-3=0

We get rid of parentheses

9a-4a-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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