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(3x-70)=45
We move all terms to the left:
(3x-70)-(45)=0
We get rid of parentheses
3x-70-45=0
We add all the numbers together, and all the variables
3x-115=0
We move all terms containing x to the left, all other terms to the right
3x=115
x=115/3
x=38+1/3
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