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-50=19+k
We move all terms to the left:
-50-(19+k)=0
We add all the numbers together, and all the variables
-(k+19)-50=0
We get rid of parentheses
-k-19-50=0
We add all the numbers together, and all the variables
-1k-69=0
We move all terms containing k to the left, all other terms to the right
-k=69
k=69/-1
k=-69
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