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-12k-13+14k=-k+20
We move all terms to the left:
-12k-13+14k-(-k+20)=0
We add all the numbers together, and all the variables
-12k+14k-(-1k+20)-13=0
We add all the numbers together, and all the variables
2k-(-1k+20)-13=0
We get rid of parentheses
2k+1k-20-13=0
We add all the numbers together, and all the variables
3k-33=0
We move all terms containing k to the left, all other terms to the right
3k=33
k=33/3
k=11
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