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-10+x/2=-9
We move all terms to the left:
-10+x/2-(-9)=0
We add all the numbers together, and all the variables
x/2-1=0
We multiply all the terms by the denominator
x-1*2=0
We add all the numbers together, and all the variables
x-2=0
We move all terms containing x to the left, all other terms to the right
x=2
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