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3x-18=0*
We move all terms to the left:
3x-18-(0*)=0
We add all the numbers together, and all the variables
3x-18-0=0
We add all the numbers together, and all the variables
3x-18=0
We move all terms containing x to the left, all other terms to the right
3x=18
x=18/3
x=6
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