3x-42=81

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Solution for 3x-42=81 equation: 



3x-42=81

We move all terms to the left:

3x-42-(81)=0

We add all the numbers together, and all the variables

3x-123=0

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

3x=123

x=123/3

x=41

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