3(4-5r)=4r-9(5+2r)

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Solution for 3(4-5r)=4r-9(5+2r) equation: 



3(4-5r)=4r-9(5+2r)

We move all terms to the left:

3(4-5r)-(4r-9(5+2r))=0

We add all the numbers together, and all the variables

3(-5r+4)-(4r-9(2r+5))=0

We multiply parentheses

-15r-(4r-9(2r+5))+12=0



We calculate terms in parentheses: -(4r-9(2r+5)), so:

4r-9(2r+5)

We multiply parentheses

4r-18r-45

We add all the numbers together, and all the variables

-14r-45

Back to the equation:

-(-14r-45)



We get rid of parentheses

-15r+14r+45+12=0

We add all the numbers together, and all the variables

-1r+57=0

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

-r=-57

r=-57/-1

r=+57

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