-40=7(-2r+2)-4r

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Solution for -40=7(-2r+2)-4r equation: 



-40=7(-2r+2)-4r

We move all terms to the left:

-40-(7(-2r+2)-4r)=0



We calculate terms in parentheses: -(7(-2r+2)-4r), so:

7(-2r+2)-4r

We add all the numbers together, and all the variables

-4r+7(-2r+2)

We multiply parentheses

-4r-14r+14

We add all the numbers together, and all the variables

-18r+14

Back to the equation:

-(-18r+14)



We get rid of parentheses

18r-14-40=0

We add all the numbers together, and all the variables

18r-54=0

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

18r=54

r=54/18

r=3

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