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2/5k-1/5k+12=8
We simplify the equation to the form, which is simple to understand
2/5k-1/5k+12=8
We move all terms containing k to the left and all other terms to the right.
+5k+5k=+8-12
We simplify left and right side of the equation.
+10k=-4
We divide both sides of the equation by 10 to get k.
k=-0.4
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