-4(r+18)+20=20

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Solution for -4(r+18)+20=20 equation: 



-4(r+18)+20=20

We move all terms to the left:

-4(r+18)+20-(20)=0

We add all the numbers together, and all the variables

-4(r+18)=0

We multiply parentheses

-4r-72=0

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

-4r=72

r=72/-4

r=-18

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