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-15x-13x+18=-12x-20
We move all terms to the left:
-15x-13x+18-(-12x-20)=0
We add all the numbers together, and all the variables
-28x-(-12x-20)+18=0
We get rid of parentheses
-28x+12x+20+18=0
We add all the numbers together, and all the variables
-16x+38=0
We move all terms containing x to the left, all other terms to the right
-16x=-38
x=-38/-16
x=2+3/8
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