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-7(1-k)=-7(1+3k)
We simplify the equation to the form, which is simple to understand
-7(1-k)=-7(1+3k)
Reorder the terms in parentheses
+(-7+7k)=-7*(1+3k)
Remove unnecessary parentheses
-7+7k=-7+*(+1+3k+)
Reorder the terms in parentheses
-7+7k=+(-7-21k)
Remove unnecessary parentheses
-7+7k=-7-21k
We move all terms containing k to the left and all other terms to the right.
+7k+21k=-7+7
We simplify left and right side of the equation.
+28k=0
We divide both sides of the equation by 28 to get k.
k=0
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