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(81.5+3x)/4=89
We move all terms to the left:
(81.5+3x)/4-(89)=0
We add all the numbers together, and all the variables
(3x+81.5)/4-89=0
We multiply all the terms by the denominator
(3x+81.5)-89*4=0
We add all the numbers together, and all the variables
(3x+81.5)-356=0
We get rid of parentheses
3x+81.5-356=0
We add all the numbers together, and all the variables
3x-274.5=0
We move all terms containing x to the left, all other terms to the right
3x=274.5
x=274.5/3
x=91+1/2
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