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x/2-21=-16
We move all terms to the left:
x/2-21-(-16)=0
We add all the numbers together, and all the variables
x/2-5=0
We multiply all the terms by the denominator
x-5*2=0
We add all the numbers together, and all the variables
x-10=0
We move all terms containing x to the left, all other terms to the right
x=10
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