3x-63=21

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Solution for 3x-63=21 equation: 



3x-63=21

We move all terms to the left:

3x-63-(21)=0

We add all the numbers together, and all the variables

3x-84=0

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

3x=84

x=84/3

x=28

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