42-x=63-8x

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Solution for 42-x=63-8x equation: 



42-x=63-8x

We move all terms to the left:

42-x-(63-8x)=0

We add all the numbers together, and all the variables

-x-(-8x+63)+42=0

We add all the numbers together, and all the variables

-1x-(-8x+63)+42=0

We get rid of parentheses

-1x+8x-63+42=0

We add all the numbers together, and all the variables

7x-21=0

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

7x=21

x=21/7

x=3

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