-40+7r=4(5r+8)+5r

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Solution for -40+7r=4(5r+8)+5r equation: 



-40+7r=4(5r+8)+5r

We move all terms to the left:

-40+7r-(4(5r+8)+5r)=0



We calculate terms in parentheses: -(4(5r+8)+5r), so:

4(5r+8)+5r

We add all the numbers together, and all the variables

5r+4(5r+8)

We multiply parentheses

5r+20r+32

We add all the numbers together, and all the variables

25r+32

Back to the equation:

-(25r+32)



We get rid of parentheses

7r-25r-32-40=0

We add all the numbers together, and all the variables

-18r-72=0

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

-18r=72

r=72/-18

r=-4

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