7a-12=2a+18

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Solution for 7a-12=2a+18 equation: 



7a-12=2a+18

We move all terms to the left:

7a-12-(2a+18)=0

We get rid of parentheses

7a-2a-18-12=0

We add all the numbers together, and all the variables

5a-30=0

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

5a=30

a=30/5

a=6

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