3x=63+21x

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Solution for 3x=63+21x equation: 



3x=63+21x

We move all terms to the left:

3x-(63+21x)=0

We add all the numbers together, and all the variables

3x-(21x+63)=0

We get rid of parentheses

3x-21x-63=0

We add all the numbers together, and all the variables

-18x-63=0

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

-18x=63

x=63/-18

x=-3+1/2

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