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-12k+2k=-2k-13k-13
We move all terms to the left:
-12k+2k-(-2k-13k-13)=0
We add all the numbers together, and all the variables
-12k+2k-(-15k-13)=0
We add all the numbers together, and all the variables
-10k-(-15k-13)=0
We get rid of parentheses
-10k+15k+13=0
We add all the numbers together, and all the variables
5k+13=0
We move all terms containing k to the left, all other terms to the right
5k=-13
k=-13/5
k=-2+3/5
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