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-7(3k-3)=-9k-39
We simplify the equation to the form, which is simple to understand
-7(3k-3)=-9k-39
Reorder the terms in parentheses
+(-21k+21)=-9k-39
Remove unnecessary parentheses
-21k+21=-9k-39
We move all terms containing k to the left and all other terms to the right.
-21k+9k=-39-21
We simplify left and right side of the equation.
-12k=-60
We divide both sides of the equation by -12 to get k.
k=5
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