-78+3x=42-x

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Solution for -78+3x=42-x equation: 



-78+3x=42-x

We move all terms to the left:

-78+3x-(42-x)=0

We add all the numbers together, and all the variables

3x-(-1x+42)-78=0

We get rid of parentheses

3x+1x-42-78=0

We add all the numbers together, and all the variables

4x-120=0

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

4x=120

x=120/4

x=30

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