40=8(r+18)

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Solution for 40=8(r+18) equation: 



40=8(r+18)

We move all terms to the left:

40-(8(r+18))=0



We calculate terms in parentheses: -(8(r+18)), so:

8(r+18)

We multiply parentheses

8r+144

Back to the equation:

-(8r+144)



We get rid of parentheses

-8r-144+40=0

We add all the numbers together, and all the variables

-8r-104=0

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

-8r=104

r=104/-8

r=-13

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