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7.75+8.1k+5.17=-3.4k-7.78
We move all terms to the left:
7.75+8.1k+5.17-(-3.4k-7.78)=0
We add all the numbers together, and all the variables
8.1k-(-3.4k-7.78)+12.92=0
We get rid of parentheses
8.1k+3.4k+7.78+12.92=0
We add all the numbers together, and all the variables
11.5k+20.7=0
We move all terms containing k to the left, all other terms to the right
11.5k=-20.7
k=-20.7/11.5
k=-1+7.6666666666667/9.5833333333333
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