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60/70=42/70r
We move all terms to the left:
60/70-(42/70r)=0
Domain of the equation: 70r)!=0We add all the numbers together, and all the variables
r!=0/1
r!=0
r∈R
-(+42/70r)+60/70=0
We get rid of parentheses
-42/70r+60/70=0
We calculate fractions
=0
r=0/1
r=0
Równanie nie ma rozwiązania
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