4/10=(r+5)/3

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Solution for 4/10=(r+5)/3 equation: 



4/10=(r+5)/3

We move all terms to the left:

4/10-((r+5)/3)=0

We calculate fractions


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



We calculate terms in parentheses: +(-((r+5)*10)/()+()/(), so:

-((r+5)*10)/()+()/(

We add all the numbers together, and all the variables

-((r+5)*10)/()+1

We multiply all the terms by the denominator


-((r+5)*10)+1*()



We calculate terms in parentheses: -((r+5)*10), so:

(r+5)*10

We multiply parentheses

10r+50

Back to the equation:

-(10r+50)



We add all the numbers together, and all the variables

-(10r+50)

We get rid of parentheses

-10r-50

Back to the equation:

+(-10r-50)



We get rid of parentheses

-10r-50=0

We move all terms containing r to the left, all other terms to the right

-10r=50

r=50/-10

r=-5

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