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(0.75x-3)+(66)=90
We move all terms to the left:
(0.75x-3)+(66)-(90)=0
We add all the numbers together, and all the variables
(0.75x-3)-24=0
We get rid of parentheses
0.75x-3-24=0
We add all the numbers together, and all the variables
0.75x-27=0
We move all terms containing x to the left, all other terms to the right
0.75x=27
x=27/0.75
x=36
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