7a+2=3a+42

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Solution for 7a+2=3a+42 equation: 



7a+2=3a+42

We move all terms to the left:

7a+2-(3a+42)=0

We get rid of parentheses

7a-3a-42+2=0

We add all the numbers together, and all the variables

4a-40=0

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

4a=40

a=40/4

a=10

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