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-7k+19-13k=-19-18k
We move all terms to the left:
-7k+19-13k-(-19-18k)=0
We add all the numbers together, and all the variables
-7k-13k-(-18k-19)+19=0
We add all the numbers together, and all the variables
-20k-(-18k-19)+19=0
We get rid of parentheses
-20k+18k+19+19=0
We add all the numbers together, and all the variables
-2k+38=0
We move all terms containing k to the left, all other terms to the right
-2k=-38
k=-38/-2
k=+19
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