45-r=4(r+18)

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Solution for 45-r=4(r+18) equation: 



45-r=4(r+18)

We move all terms to the left:

45-r-(4(r+18))=0

We add all the numbers together, and all the variables

-1r-(4(r+18))+45=0



We calculate terms in parentheses: -(4(r+18)), so:

4(r+18)

We multiply parentheses

4r+72

Back to the equation:

-(4r+72)



We get rid of parentheses

-1r-4r-72+45=0

We add all the numbers together, and all the variables

-5r-27=0

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

-5r=27

r=27/-5

r=-5+2/5

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