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19k+2=20k+19
We move all terms to the left:
19k+2-(20k+19)=0
We get rid of parentheses
19k-20k-19+2=0
We add all the numbers together, and all the variables
-1k-17=0
We move all terms containing k to the left, all other terms to the right
-k=17
k=17/-1
k=-17
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