5(3r+9)=12(5r-15)

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Solution for 5(3r+9)=12(5r-15) equation: 



5(3r+9)=12(5r-15)

We move all terms to the left:

5(3r+9)-(12(5r-15))=0

We multiply parentheses

15r-(12(5r-15))+45=0



We calculate terms in parentheses: -(12(5r-15)), so:

12(5r-15)

We multiply parentheses

60r-180

Back to the equation:

-(60r-180)



We get rid of parentheses

15r-60r+180+45=0

We add all the numbers together, and all the variables

-45r+225=0

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

-45r=-225

r=-225/-45

r=+5

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