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13x+18=2x+30
We move all terms to the left:
13x+18-(2x+30)=0
We get rid of parentheses
13x-2x-30+18=0
We add all the numbers together, and all the variables
11x-12=0
We move all terms containing x to the left, all other terms to the right
11x=12
x=12/11
x=1+1/11
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