Solve: x+y+z=10x + y + z = 10x+y+z=10 and x=y=2zx = y = 2zx=y=2z.
(4,4,2)(4, 4, 2)(4,4,2)
(2,2,1)(2, 2, 1)(2,2,1)
(5,5,2.5)(5, 5, 2.5)(5,5,2.5)
(4,4,1)(4, 4, 1)(4,4,1)