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90=5x-3=2x+30
We move all terms to the left:
90-(5x-3)=0
We get rid of parentheses
-5x+3+90=0
We add all the numbers together, and all the variables
-5x+93=0
We move all terms containing x to the left, all other terms to the right
-5x=-93
x=-93/-5
x=18+3/5
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