90=(8r-1)6+-5

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Solution for 90=(8r-1)6+-5 equation: 



90=(8r-1)6+-5

We move all terms to the left:

90-((8r-1)6+-5)=0

We use the square of the difference formula

-((8r-1)6-5)+90=0



We calculate terms in parentheses: -((8r-1)6-5), so:

(8r-1)6-5

We multiply parentheses

48r-6-5

We add all the numbers together, and all the variables

48r-11

Back to the equation:

-(48r-11)



We get rid of parentheses

-48r+11+90=0

We add all the numbers together, and all the variables

-48r+101=0

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

-48r=-101

r=-101/-48

r=2+5/48

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