, ,

Add to both sides of the equation.

Add to both sides of the equation.

Replace all occurrences of in with .

Simplify .

Simplify each term.

Apply the distributive property.

Simplify.

Multiply by .

Multiply by .

Simplify by adding terms.

Add and .

Add and .

Replace all occurrences of in with .

Simplify .

Simplify each term.

Apply the distributive property.

Simplify.

Multiply by .

Multiply by .

Simplify by adding terms.

Combine the opposite terms in .

Add and .

Add and .

Subtract from .

Move all terms not containing to the right side of the equation.

Add to both sides of the equation.

Add and .

Divide each term by and simplify.

Divide each term in by .

Cancel the common factor of .

Cancel the common factor.

Divide by .

Divide by .

Replace all occurrences of in with .

Simplify .

Multiply by .

Add and .

Replace all occurrences of in with .

Simplify .

Multiply by .

Subtract from .

Add to both sides of the equation.

Add and .

Replace all occurrences of in with .

Subtract from .

The solution to the system is the complete set of ordered pairs that are valid solutions.

The result can be shown in multiple forms.

Point Form:

Equation Form:

Solve by Substitution x-y-2z=4 , -x+2y+z=1 , -x+y-3z=11