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z/2-3/4=21/4
We move all terms to the left:
z/2-3/4-(21/4)=0
We add all the numbers together, and all the variables
z/2-3/4-(+21/4)=0
We get rid of parentheses
z/2-3/4-21/4=0
We calculate fractions
There is no solution for this equation
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