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5(-5r-6)=-130
We move all terms to the left:
5(-5r-6)-(-130)=0
We add all the numbers together, and all the variables
5(-5r-6)+130=0
We multiply parentheses
-25r-30+130=0
We add all the numbers together, and all the variables
-25r+100=0
We move all terms containing r to the left, all other terms to the right
-25r=-100
r=-100/-25
r=+4
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