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828=23(k+31)
We move all terms to the left:
828-(23(k+31))=0
We calculate terms in parentheses: -(23(k+31)), so:We get rid of parentheses
23(k+31)
We multiply parentheses
23k+713
Back to the equation:
-(23k+713)
-23k-713+828=0
We add all the numbers together, and all the variables
-23k+115=0
We move all terms containing k to the left, all other terms to the right
-23k=-115
k=-115/-23
k=+5
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