65-r=7(r+15)

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Solution for 65-r=7(r+15) equation: 



65-r=7(r+15)

We move all terms to the left:

65-r-(7(r+15))=0

We add all the numbers together, and all the variables

-1r-(7(r+15))+65=0



We calculate terms in parentheses: -(7(r+15)), so:

7(r+15)

We multiply parentheses

7r+105

Back to the equation:

-(7r+105)



We get rid of parentheses

-1r-7r-105+65=0

We add all the numbers together, and all the variables

-8r-40=0

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

-8r=40

r=40/-8

r=-5

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