Mathematical proof that 9.99999 recurring equals 10........

[thorney]

x = 9.9999999 recurring
10x = 99.9999999 recurring
10x - x = 99.999999 - 9.999999 = 90
9x = 90
x = 90 / 9 = 10
x = 10
10 = 9.999999 recurring

I found this interesting :p