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-174=r+-859
We move all terms to the left:
-174-(r+-859)=0
We add all the numbers together, and all the variables
-(r-859)-174=0
We get rid of parentheses
-r+859-174=0
We add all the numbers together, and all the variables
-1r+685=0
We move all terms containing r to the left, all other terms to the right
-r=-685
r=-685/-1
r=+685
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