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:
`{(8x,-,25y,+,93z,=,-68),(-2x,+,9y,-,37z,=,28),(-x,+,5y,-,21z,=,16):}`
x =
y =
z =
`4+4z`
`4+5z`
`z`