Solve 4x-xy=4

$$4 x - x y = 4$$

Solve for x

$$x=\frac{4}{4-y}$$

$$y\neq 4$$

Steps for Solving Linear Equation

Combine all terms containing x.

$$\left(4-y\right)x=4$$

Divide both sides by 4-y.

$$\frac{\left(4-y\right)x}{4-y}=\frac{4}{4-y}$$

Dividing by 4-y undoes the multiplication by 4-y.

$$x=\frac{4}{4-y}$$

Solve for y

$$y=4-\frac{4}{x}$$

$$x\neq 0$$

Steps for Solving Linear Equation

Subtract 4x from both sides.

$$-xy=4-4x$$

The equation is in standard form.

$$\left(-x\right)y=4-4x$$

Divide both sides by -x.

$$\frac{\left(-x\right)y}{-x}=\frac{4-4x}{-x}$$

Dividing by -x undoes the multiplication by -x.

$$y=\frac{4-4x}{-x}$$

Divide 4-4x by -x.

$$y=4-\frac{4}{x}$$