-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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