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4-0.8k=4
We simplify the equation to the form, which is simple to understand
4-0.8k=4
We move all terms containing k to the left and all other terms to the right.
-0.8k=+4-4
We simplify left and right side of the equation.
-0.8k=0
We divide both sides of the equation by -0.8 to get k.
k=-0
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