Solve 4.2x-2y=16.8

$$4.2 x - 2 y = 16.8$$

Solve for x

$$x=\frac{10y}{21}+4$$

Steps for Solving Linear Equation

Add 2y to both sides.

$$4.2x=16.8+2y$$

The equation is in standard form.

$$4.2x=2y+16.8$$

Divide both sides of the equation by 4.2, which is the same as multiplying both sides by the reciprocal of the fraction.

$$\frac{4.2x}{4.2}=\frac{2y+16.8}{4.2}$$

Dividing by 4.2 undoes the multiplication by 4.2.

$$x=\frac{2y+16.8}{4.2}$$

Divide 16.8+2y by 4.2 by multiplying 16.8+2y by the reciprocal of 4.2.

$$x=\frac{10y}{21}+4$$

Solve for y

$$y=\frac{21\left(x-4\right)}{10}$$

Steps for Solving Linear Equation

Subtract 4.2x from both sides.

$$-2y=16.8-4.2x$$

The equation is in standard form.

$$-2y=\frac{84-21x}{5}$$

Divide both sides by -2.

$$\frac{-2y}{-2}=\frac{84-21x}{-2\times 5}$$

Dividing by -2 undoes the multiplication by -2.

$$y=\frac{84-21x}{-2\times 5}$$

Divide \frac{84-21x}{5} by -2.

$$y=\frac{21x}{10}-\frac{42}{5}$$