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5x/3+20=90
We move all terms to the left:
5x/3+20-(90)=0
We add all the numbers together, and all the variables
5x/3-70=0
We multiply all the terms by the denominator
5x-70*3=0
We add all the numbers together, and all the variables
5x-210=0
We move all terms containing x to the left, all other terms to the right
5x=210
x=210/5
x=42
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