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k+6k-9=0
We simplify the equation to the form, which is simple to understand
k+6k-9=0
We move all terms containing k to the left and all other terms to the right.
+1k+6k=0+9
We simplify left and right side of the equation.
+7k=+9
We divide both sides of the equation by 7 to get k.
k=1.28571428571
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