9r-4(r+5)=5(2r-5)-15

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Solution for 9r-4(r+5)=5(2r-5)-15 equation: 



9r-4(r+5)=5(2r-5)-15

We move all terms to the left:

9r-4(r+5)-(5(2r-5)-15)=0

We multiply parentheses

9r-4r-(5(2r-5)-15)-20=0



We calculate terms in parentheses: -(5(2r-5)-15), so:

5(2r-5)-15

We multiply parentheses

10r-25-15

We add all the numbers together, and all the variables

10r-40

Back to the equation:

-(10r-40)



We add all the numbers together, and all the variables

5r-(10r-40)-20=0

We get rid of parentheses

5r-10r+40-20=0

We add all the numbers together, and all the variables

-5r+20=0

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

-5r=-20

r=-20/-5

r=+4

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