, ,

Simplify each term.

Multiply by .

Multiply by .

Multiply by .

Simplify .

Simplify each term.

Multiply by .

Multiply by .

Add and .

Simplify each term.

Multiply by .

Multiply by .

Multiply by .

Rewrite the equation as .

Subtract from both sides of the equation.

Replace all occurrences of in with .

Replace all occurrences of in with .

Add and .

Add and .

Rewrite the equation as .

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 .

Multiply each term in by

Multiply each term in by .

Multiply .

Multiply by .

Multiply by .

Simplify each term.

Multiply by .

Multiply .

Multiply by .

Multiply by .

Replace all occurrences of in with .

Replace all occurrences of in with .

Simplify .

Simplify each term.

Apply the distributive property.

Multiply by .

Add and .

Simplify .

Simplify each term.

Apply the distributive property.

Multiply by .

Simplify by adding terms.

Combine the opposite terms in .

Add and .

Add and .

Add and .

Since , there are no solutions.

No solution

Solve by Substitution 19=1x+1y+1z , 15=1x+2y+0z , 13=1x+1y+1z