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-2x+8=-9x
We move all terms to the left:
-2x+8-(-9x)=0
We get rid of parentheses
-2x+9x+8=0
We add all the numbers together, and all the variables
7x+8=0
We move all terms containing x to the left, all other terms to the right
7x=-8
x=-8/7
x=-1+1/7
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