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22=r+(-23)
We move all terms to the left:
22-(r+(-23))=0
We calculate terms in parentheses: -(r+(-23)), so:We get rid of parentheses
r+(-23)
We add all the numbers together, and all the variables
r-23
Back to the equation:
-(r-23)
-r+23+22=0
We add all the numbers together, and all the variables
-1r+45=0
We move all terms containing r to the left, all other terms to the right
-r=-45
r=-45/-1
r=+45
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