, ,

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 .

Subtract from .

Replace all occurrences of in with .

Simplify .

Simplify each term.

Apply the distributive property.

Simplify.

Multiply by .

Multiply by .

Simplify by adding terms.

Subtract from .

Add and .

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

Subtract from both sides of the equation.

Subtract from both sides of the equation.

Subtract from .

Divide each term by and simplify.

Divide each term in by .

Cancel the common factor of .

Cancel the common factor.

Divide by .

Simplify each term.

Divide by .

Cancel the common factor of .

Cancel the common factor.

Divide by .

Replace all occurrences of in with .

Simplify .

Simplify each term.

Apply the distributive property.

Multiply by .

Simplify by adding terms.

Combine the opposite terms in .

Subtract from .

Add and .

Subtract from .

Replace all occurrences of in with .

Simplify .

Simplify each term.

Apply the distributive property.

Multiply by .

Simplify by adding terms.

Subtract from .

Add and .

Add and .

Remove any equations from the system that are always true.

Solve by Substitution x-3y-z=9 , -x+8y-4z=-24 , 2x-15y+7z=45