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-4k+9k+2=12
We simplify the equation to the form, which is simple to understand
-4k+9k+2=12
We move all terms containing k to the left and all other terms to the right.
-4k+9k=+12-2
We simplify left and right side of the equation.
+5k=+10
We divide both sides of the equation by 5 to get k.
k=2
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