2x-42=84-4x

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Solution for 2x-42=84-4x equation: 



2x-42=84-4x

We move all terms to the left:

2x-42-(84-4x)=0

We add all the numbers together, and all the variables

2x-(-4x+84)-42=0

We get rid of parentheses

2x+4x-84-42=0

We add all the numbers together, and all the variables

6x-126=0

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

6x=126

x=126/6

x=21

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