9x-21=21

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Solution for 9x-21=21 equation:



9x-21=21
We move all terms to the left:
9x-21-(21)=0
We add all the numbers together, and all the variables
9x-42=0
We move all terms containing x to the left, all other terms to the right
9x=42
x=42/9
x=4+2/3

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