3x-21=51

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Solution for 3x-21=51 equation: 



3x-21=51

We move all terms to the left:

3x-21-(51)=0

We add all the numbers together, and all the variables

3x-72=0

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

3x=72

x=72/3

x=24

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