2a+30=4a+42

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Solution for 2a+30=4a+42 equation: 



2a+30=4a+42

We move all terms to the left:

2a+30-(4a+42)=0

We get rid of parentheses

2a-4a-42+30=0

We add all the numbers together, and all the variables

-2a-12=0

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

-2a=12

a=12/-2

a=-6

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