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39+3k=4(k+9)
We simplify the equation to the form, which is simple to understand
39+3k=4(k+9)
Reorder the terms in parentheses
39+3k=+(+4k+36)
Remove unnecessary parentheses
+39+3k=+4k+36
We move all terms containing k to the left and all other terms to the right.
+3k-4k=+36-39
We simplify left and right side of the equation.
-1k=-3
We divide both sides of the equation by -1 to get k.
k=3
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