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-k+8=-4k+k-4
We simplify the equation to the form, which is simple to understand
-k+8=-4k+k-4
We move all terms containing k to the left and all other terms to the right.
-1k+4k-1k=-4-8
We simplify left and right side of the equation.
+2k=-12
We divide both sides of the equation by 2 to get k.
k=-6
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