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(5x+18)+(3x-8)=8100
We move all terms to the left:
(5x+18)+(3x-8)-(8100)=0
We get rid of parentheses
5x+3x+18-8-8100=0
We add all the numbers together, and all the variables
8x-8090=0
We move all terms containing x to the left, all other terms to the right
8x=8090
x=8090/8
x=1011+1/4
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