The augmented matrix of an equation contains only its numerical coefficients.
Let's list down the numerical coefficients of each equation.
Equation 1: 1, -1. 1, and 20
Equation 2: 6, 6, 0, and 4. (We have zero because there is no coefficient for variable z.)
Equation 3: 1, 1, 5, and 5
Let's fill in the blanks in the augmented matrix using the numerical coefficients above.
The augmented matrix of the given system of equations is:
