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k+2+8k=-25
We simplify the equation to the form, which is simple to understand
k+2+8k=-25
We move all terms containing k to the left and all other terms to the right.
+1k+8k=-25-2
We simplify left and right side of the equation.
+9k=-27
We divide both sides of the equation by 9 to get k.
k=-3
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