,

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

Add to both sides of the equation.

Add to both sides of the equation.

Multiply each term in by

Multiply each term in by .

Multiply .

Multiply by .

Multiply by .

Simplify each term.

Multiply by .

Multiply by .

Multiply by .

Simplify .

Simplify each term.

Apply the distributive property.

Simplify.

Multiply by .

Multiply by .

Multiply by .

Simplify by adding terms.

Add and .

Add and .

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

Add to 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 .

Move the negative in front of the fraction.

Simplify each term.

Apply the distributive property.

Combine and .

Multiply .

Multiply by .

Combine and .

Move the negative in front of the fraction.

To write as a fraction with a common denominator, multiply by .

Combine and .

Combine the numerators over the common denominator.

Simplify the numerator.

Multiply by .

Add and .

Move the negative in front of the fraction.

To write as a fraction with a common denominator, multiply by .

Simplify terms.

Combine and .

Combine the numerators over the common denominator.

Combine the numerators over the common denominator.

Simplify the numerator.

Multiply by .

Subtract from .

Simplify with factoring out.

Factor out of .

Rewrite as .

Factor out of .

Simplify the expression.

Rewrite as .

Move the negative in front of the fraction.

Solve by Substitution -17x-y-5z=4 , -18x-y+2z=3