Asculpture is 10 feet long and 6 feet wide the artist made the sculptures so the height is a geometric mean of the length and the width what is the height of a sculpture to the nearest 10th of a foot

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.

1/x-1+3/x-1=1
x is -1.333