Solve for k
k=\frac{18}{23}\approx 0.782608696
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12-21k=-2\left(3-k\right)
Use the distributive property to multiply 3 by 4-7k.
12-21k=-6+2k
Use the distributive property to multiply -2 by 3-k.
12-21k-2k=-6
Subtract 2k from both sides.
12-23k=-6
Combine -21k and -2k to get -23k.
-23k=-6-12
Subtract 12 from both sides.
-23k=-18
Subtract 12 from -6 to get -18.
k=\frac{-18}{-23}
Divide both sides by -23.
k=\frac{18}{23}
Fraction \frac{-18}{-23} can be simplified to \frac{18}{23} by removing the negative sign from both the numerator and the denominator.
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