-1-4(2r-5)=20

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Solution for -1-4(2r-5)=20 equation: 



-1-4(2r-5)=20

We move all terms to the left:

-1-4(2r-5)-(20)=0

We add all the numbers together, and all the variables

-4(2r-5)-21=0

We multiply parentheses

-8r+20-21=0

We add all the numbers together, and all the variables

-8r-1=0

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

-8r=1

r=1/-8

r=-1/8

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