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10-2k=5(-1-k)
We simplify the equation to the form, which is simple to understand
10-2k=5(-1-k)
Reorder the terms in parentheses
10-2k=+(-5-5k)
Remove unnecessary parentheses
+10-2k=-5-5k
We move all terms containing k to the left and all other terms to the right.
-2k+5k=-5-10
We simplify left and right side of the equation.
+3k=-15
We divide both sides of the equation by 3 to get k.
k=-5
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