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100=4x-18
We move all terms to the left:
100-(4x-18)=0
We get rid of parentheses
-4x+18+100=0
We add all the numbers together, and all the variables
-4x+118=0
We move all terms containing x to the left, all other terms to the right
-4x=-118
x=-118/-4
x=29+1/2
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