Solve 4x-5y+20=0

$$4 x - 5 y + 20 = 0$$

Solve for x

$$x=\frac{5\left(y-4\right)}{4}$$

Steps for Solving Linear Equation

Add 5y to both sides. Anything plus zero gives itself.

$$4x+20=5y$$

Subtract 20 from both sides.

$$4x=5y-20$$

Divide both sides by 4.

$$\frac{4x}{4}=\frac{5y-20}{4}$$

Dividing by 4 undoes the multiplication by 4.

$$x=\frac{5y-20}{4}$$

Divide -20+5y by 4.

$$x=\frac{5y}{4}-5$$

Solve for y

$$y=\frac{4\left(x+5\right)}{5}$$

Steps for Solving Linear Equation

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

$$-5y+20=-4x$$

Subtract 20 from both sides.

$$-5y=-4x-20$$

Divide both sides by -5.

$$\frac{-5y}{-5}=\frac{-4x-20}{-5}$$

Dividing by -5 undoes the multiplication by -5.

$$y=\frac{-4x-20}{-5}$$

Divide -4x-20 by -5.

$$y=\frac{4x}{5}+4$$