63=6x+7x+8x

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Solution for 63=6x+7x+8x equation: 



63=6x+7x+8x

We move all terms to the left:

63-(6x+7x+8x)=0

We add all the numbers together, and all the variables

-(+21x)+63=0

We get rid of parentheses

-21x+63=0

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

-21x=-63

x=-63/-21

x=+3

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