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5(r+4)=25-
We move all terms to the left:
5(r+4)-(25-)=0
We add all the numbers together, and all the variables
5(r+4)-0=0
We add all the numbers together, and all the variables
5(r+4)=0
We multiply parentheses
5r+20=0
We move all terms containing r to the left, all other terms to the right
5r=-20
r=-20/5
r=-4
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