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k+8-4k=40
Multiply both sides of the equation by 4.
-3k+8=40
Combine k and -4k to get -3k.
-3k=40-8
Subtract 8 from both sides.
-3k=32
Subtract 8 from 40 to get 32.
k=\frac{32}{-3}
Divide both sides by -3.
k=-\frac{32}{3}
Fraction \frac{32}{-3} can be rewritten as -\frac{32}{3} by extracting the negative sign.