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99=-2k+5(2k+7)
We simplify the equation to the form, which is simple to understand
99=-2k+5(2k+7)
Reorder the terms in parentheses
99=-2k+(+10k+35)
Remove unnecessary parentheses
+99=-2k+10k+35
We move all terms containing k to the left and all other terms to the right.
+2k-10k=+35-99
We simplify left and right side of the equation.
-8k=-64
We divide both sides of the equation by -8 to get k.
k=8
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