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(2x+7)+18=90
We move all terms to the left:
(2x+7)+18-(90)=0
We add all the numbers together, and all the variables
(2x+7)-72=0
We get rid of parentheses
2x+7-72=0
We add all the numbers together, and all the variables
2x-65=0
We move all terms containing x to the left, all other terms to the right
2x=65
x=65/2
x=32+1/2
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