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10z+1/2-4z+4/5=21
We move all terms to the left:
10z+1/2-4z+4/5-(21)=0
determiningTheFunctionDomain 10z-4z-21+1/2+4/5=0
We add all the numbers together, and all the variables
6z-21+1/2+4/5=0
We calculate fractions
There is no solution for this equation
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