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3x-30=54+30
We move all terms to the left:
3x-30-(54+30)=0
We add all the numbers together, and all the variables
3x-30-84=0
We add all the numbers together, and all the variables
3x-114=0
We move all terms containing x to the left, all other terms to the right
3x=114
x=114/3
x=38
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