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(-37)=r-(-45)
We move all terms to the left:
(-37)-(r-(-45))=0
We add all the numbers together, and all the variables
-(r-(-45))-37=0
We calculate terms in parentheses: -(r-(-45)), so:We get rid of parentheses
r-(-45)
We add all the numbers together, and all the variables
r+45
Back to the equation:
-(r+45)
-r-45-37=0
We add all the numbers together, and all the variables
-1r-82=0
We move all terms containing r to the left, all other terms to the right
-r=82
r=82/-1
r=-82
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