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4(2-4r)-3r=65
We move all terms to the left:
4(2-4r)-3r-(65)=0
We add all the numbers together, and all the variables
4(-4r+2)-3r-65=0
We add all the numbers together, and all the variables
-3r+4(-4r+2)-65=0
We multiply parentheses
-3r-16r+8-65=0
We add all the numbers together, and all the variables
-19r-57=0
We move all terms containing r to the left, all other terms to the right
-19r=57
r=57/-19
r=-3
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