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x=+21/2=53/8
We move all terms to the left:
x-(+21/2)=0
We get rid of parentheses
x-21/2=0
We multiply all the terms by the denominator
x*2-21=0
Wy multiply elements
2x-21=0
We move all terms containing x to the left, all other terms to the right
2x=21
x=21/2
x=10+1/2
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