It should be 2, 5 if I'm not mistaken.
3.25 - 2.95 = 0.3
The difference between 3.25 and 2.95 metres is 0.3 metres.
first subtract 2 from - 5 which is 7 then subtract 3-2 then you would get x = 7 that would be my guess.
Lilly should re-estimate the original numbers to be smaller.
for example if she rounded to 10 and 20, she should go back and check and re-round to maybe 8 and 10
