42x=84x+126

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Solution for 42x=84x+126 equation: 



42x=84x+126

We move all terms to the left:

42x-(84x+126)=0

We get rid of parentheses

42x-84x-126=0

We add all the numbers together, and all the variables

-42x-126=0

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

-42x=126

x=126/-42

x=-3

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