2(4-r)=20

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Solution for 2(4-r)=20 equation: 



2(4-r)=20

We move all terms to the left:

2(4-r)-(20)=0

We add all the numbers together, and all the variables

2(-1r+4)-20=0

We multiply parentheses

-2r+8-20=0

We add all the numbers together, and all the variables

-2r-12=0

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

-2r=12

r=12/-2

r=-6

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