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5(7-5r)-6=154
We move all terms to the left:
5(7-5r)-6-(154)=0
We add all the numbers together, and all the variables
5(-5r+7)-6-154=0
We add all the numbers together, and all the variables
5(-5r+7)-160=0
We multiply parentheses
-25r+35-160=0
We add all the numbers together, and all the variables
-25r-125=0
We move all terms containing r to the left, all other terms to the right
-25r=125
r=125/-25
r=-5
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