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18x+11=3x+39
We move all terms to the left:
18x+11-(3x+39)=0
We get rid of parentheses
18x-3x-39+11=0
We add all the numbers together, and all the variables
15x-28=0
We move all terms containing x to the left, all other terms to the right
15x=28
x=28/15
x=1+13/15
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