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x/2=-100
We move all terms to the left:
x/2-(-100)=0
We add all the numbers together, and all the variables
x/2+100=0
We multiply all the terms by the denominator
x+100*2=0
We add all the numbers together, and all the variables
x+200=0
We move all terms containing x to the left, all other terms to the right
x=-200
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