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8-5x=-20x+12
We move all terms to the left:
8-5x-(-20x+12)=0
We get rid of parentheses
-5x+20x-12+8=0
We add all the numbers together, and all the variables
15x-4=0
We move all terms containing x to the left, all other terms to the right
15x=4
x=4/15
x=4/15
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