(r+6)/5=(r+8)/7

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Solution for (r+6)/5=(r+8)/7 equation: 



(r+6)/5=(r+8)/7

We move all terms to the left:

(r+6)/5-((r+8)/7)=0

We calculate fractions


r/()+(-((r+8)*5)/()=0



We calculate terms in parentheses: +(-((r+8)*5)/(), so:

-((r+8)*5)/(

We multiply all the terms by the denominator


-((r+8)*5)



We calculate terms in parentheses: -((r+8)*5), so:

(r+8)*5

We multiply parentheses

5r+40

Back to the equation:

-(5r+40)



We get rid of parentheses

-5r-40

Back to the equation:

+(-5r-40)



We get rid of parentheses

r/()-5r-40=0

We multiply all the terms by the denominator


r-5r*()-40*()=0

We add all the numbers together, and all the variables

r-5r*()=0

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