4(7-r)=40

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



4(7-r)=40

We move all terms to the left:

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

We add all the numbers together, and all the variables

4(-1r+7)-40=0

We multiply parentheses

-4r+28-40=0

We add all the numbers together, and all the variables

-4r-12=0

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

-4r=12

r=12/-4

r=-3

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