7/10*r=4/5

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Solution for 7/10*r=4/5 equation: 



7/10*r=4/5

We move all terms to the left:

7/10*r-(4/5)=0



Domain of the equation: 10*r!=0

r!=0/1

r!=0

r∈R



We add all the numbers together, and all the variables

7/10*r-(+4/5)=0

We get rid of parentheses

7/10*r-4/5=0

We calculate fractions

There is no solution for this equation

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