-3+x=3x+7

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Solution for -3+x=3x+7 equation: 



-3+x=3x+7

We move all terms to the left:

-3+x-(3x+7)=0

We get rid of parentheses

x-3x-7-3=0

We add all the numbers together, and all the variables

-2x-10=0

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

-2x=10

x=10/-2

x=-5

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