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(x/2)-(2/5)=1/2
We move all terms to the left:
(x/2)-(2/5)-(1/2)=0
We add all the numbers together, and all the variables
(+x/2)-(+2/5)-(+1/2)=0
We get rid of parentheses
x/2-2/5-1/2=0
We calculate fractions
There is no solution for this equation
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