25(r+4)=20(r+10)

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Solution for 25(r+4)=20(r+10) equation: 



25(r+4)=20(r+10)

We move all terms to the left:

25(r+4)-(20(r+10))=0

We multiply parentheses

25r-(20(r+10))+100=0



We calculate terms in parentheses: -(20(r+10)), so:

20(r+10)

We multiply parentheses

20r+200

Back to the equation:

-(20r+200)



We get rid of parentheses

25r-20r-200+100=0

We add all the numbers together, and all the variables

5r-100=0

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

5r=100

r=100/5

r=20

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