-10=40+5r

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Solution for -10=40+5r equation: 



-10=40+5r

We move all terms to the left:

-10-(40+5r)=0

We add all the numbers together, and all the variables

-(5r+40)-10=0

We get rid of parentheses

-5r-40-10=0

We add all the numbers together, and all the variables

-5r-50=0

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

-5r=50

r=50/-5

r=-10

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