69=7(r-3)+3(6r+5)

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Solution for 69=7(r-3)+3(6r+5) equation: 



69=7(r-3)+3(6r+5)

We move all terms to the left:

69-(7(r-3)+3(6r+5))=0



We calculate terms in parentheses: -(7(r-3)+3(6r+5)), so:

7(r-3)+3(6r+5)

We multiply parentheses

7r+18r-21+15

We add all the numbers together, and all the variables

25r-6

Back to the equation:

-(25r-6)



We get rid of parentheses

-25r+6+69=0

We add all the numbers together, and all the variables

-25r+75=0

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

-25r=-75

r=-75/-25

r=+3

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