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-12=x/2-10
We move all terms to the left:
-12-(x/2-10)=0
We get rid of parentheses
-x/2+10-12=0
We multiply all the terms by the denominator
-x+10*2-12*2=0
We add all the numbers together, and all the variables
-1x-4=0
We move all terms containing x to the left, all other terms to the right
-x=4
x=4/-1
x=-4
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