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-3(1-4r)+3=-48
We move all terms to the left:
-3(1-4r)+3-(-48)=0
We add all the numbers together, and all the variables
-3(-4r+1)+3-(-48)=0
We add all the numbers together, and all the variables
-3(-4r+1)+51=0
We multiply parentheses
12r-3+51=0
We add all the numbers together, and all the variables
12r+48=0
We move all terms containing r to the left, all other terms to the right
12r=-48
r=-48/12
r=-4
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