-3x=84+-15x

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Solution for -3x=84+-15x equation: 



-3x=84+-15x

We move all terms to the left:

-3x-(84+-15x)=0

We add all the numbers together, and all the variables

-3x-(-15x)=0

We get rid of parentheses

-3x+15x=0

We add all the numbers together, and all the variables

12x=0

x=0/12

x=0

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