Solve km+2km-k+4=0

$$k m + 2 k m - k + 4 = 0$$

Solve for k

$$k=-\frac{4}{3m-1}$$

$$m\neq \frac{1}{3}$$

Steps for Solving Linear Equation

Combine km and 2km to get 3km.

$$3km-k+4=0$$

Subtract 4 from both sides. Anything subtracted from zero gives its negation.

$$3km-k=-4$$

Combine all terms containing k.

$$\left(3m-1\right)k=-4$$

Divide both sides by 3m-1.

$$\frac{\left(3m-1\right)k}{3m-1}=-\frac{4}{3m-1}$$

Dividing by 3m-1 undoes the multiplication by 3m-1.

$$k=-\frac{4}{3m-1}$$

Solve for m

$$m=\frac{1}{3}-\frac{4}{3k}$$

$$k\neq 0$$

Steps for Solving Linear Equation

Combine km and 2km to get 3km.

$$3km-k+4=0$$

Add k to both sides. Anything plus zero gives itself.

$$3km+4=k$$

Subtract 4 from both sides.

$$3km=k-4$$

Divide both sides by 3k.

$$\frac{3km}{3k}=\frac{k-4}{3k}$$

Dividing by 3k undoes the multiplication by 3k.

$$m=\frac{k-4}{3k}$$

Divide k-4 by 3k.

$$m=\frac{1}{3}-\frac{4}{3k}$$