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5=-1+2k+4k
We simplify the equation to the form, which is simple to understand
5=-1+2k+4k
We move all terms containing k to the left and all other terms to the right.
-2k-4k=-1-5
We simplify left and right side of the equation.
-6k=-6
We divide both sides of the equation by -6 to get k.
k=1
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