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-13=k-3+4k
We simplify the equation to the form, which is simple to understand
-13=k-3+4k
We move all terms containing k to the left and all other terms to the right.
-1k-4k=-3+13
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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