Given that 2x – y + z = 240. If z = 2y, y = 2x, then x = ?
0
50
70
60
z = 27
y = 2x
⇒ z = 2 (2x) = 4x
2x – y + z = 240
2x – 2x + 4x = 240
4x = 240
x = 60.