Not only that, but both Y and Z are fractionary numbers
Yea, i had the same problem =/
But now they changed the equations (everyone knows that jagex is pretty bad at maths)....
For the record, the original equations posted were
Two of Treasure 1: X + (6x6) = 48
Five of Treasure 2: YX + (65/5) = 60
Eight of Treasure 3: 3ZX + 51 = 150