3a+7=4a-2

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



3a+7=4a-2

We move all terms to the left:

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

We get rid of parentheses

3a-4a+2+7=0

We add all the numbers together, and all the variables

-1a+9=0

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

-a=-9

a=-9/-1

a=+9

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