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8+2x=15x-9
We move all terms to the left:
8+2x-(15x-9)=0
We get rid of parentheses
2x-15x+9+8=0
We add all the numbers together, and all the variables
-13x+17=0
We move all terms containing x to the left, all other terms to the right
-13x=-17
x=-17/-13
x=1+4/13
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