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25+x/2+18=90
We move all terms to the left:
25+x/2+18-(90)=0
We add all the numbers together, and all the variables
x/2-47=0
We multiply all the terms by the denominator
x-47*2=0
We add all the numbers together, and all the variables
x-94=0
We move all terms containing x to the left, all other terms to the right
x=94
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