1/5(20-5y)+2/7(7y-21)=9

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Solution for 1/5(20-5y)+2/7(7y-21)=9 equation: 



1/5(20-5y)+2/7(7y-21)=9

We move all terms to the left:

1/5(20-5y)+2/7(7y-21)-(9)=0



Domain of the equation: 5(20-5y)!=0

y∈R





Domain of the equation: 7(7y-21)!=0

y∈R



We add all the numbers together, and all the variables

1/5(-5y+20)+2/7(7y-21)-9=0

We calculate fractions


(7y7/(5(-5y+20)*7(7y-21))+(10y(-)/(5(-5y+20)*7(7y-21))-9=0

We can not solve this equation

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