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-15.5-2.5k=-3.5(3k+9)
We simplify the equation to the form, which is simple to understand
-15.5-2.5k=-3.5(3k+9)
Reorder the terms in parentheses
-15.5-2.5k=+(-10.5k-31.5)
Remove unnecessary parentheses
-15.5-2.5k=-10.5k-31.5
We move all terms containing k to the left and all other terms to the right.
-2.5k+10.5k=-31.5+15.5
We simplify left and right side of the equation.
+8k=-16
We divide both sides of the equation by 8 to get k.
k=-2
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