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(2x+87)/3=90
We move all terms to the left:
(2x+87)/3-(90)=0
We multiply all the terms by the denominator
(2x+87)-90*3=0
We add all the numbers together, and all the variables
(2x+87)-270=0
We get rid of parentheses
2x+87-270=0
We add all the numbers together, and all the variables
2x-183=0
We move all terms containing x to the left, all other terms to the right
2x=183
x=183/2
x=91+1/2
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