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3x-39=-15x-11
We move all terms to the left:
3x-39-(-15x-11)=0
We get rid of parentheses
3x+15x+11-39=0
We add all the numbers together, and all the variables
18x-28=0
We move all terms containing x to the left, all other terms to the right
18x=28
x=28/18
x=1+5/9
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