3. Solve the following system of equations. 2x +y +z = 11
3x + 5y + 5z = 34
5x + 6y + 3z = 42
Part A (10 points) Solve using Gaussian
elimination or a matrix. If you use a
matrix, you must write out your original
matrix and answer matrix. Show your
answer as a point (x, y, z)
I
Part B (2 points) Show that your
solution works in at least one of the
original equations.