Try another version of this question Solve the system of equations. If the system has an infinite number of solutions, express them in terms of the parameter z. Get help:
`{(11x,-,20y,-,16z,=,33),(12x,-,10y,+,18z,=,36),(-4x,+,5y,-,z,=,-12):}`
x =
y =
z =
`3-4z`
`-3z`
`z`