The sum of the digits is 11. The tens digit is one less than three times the ones digit. Find the original number]

It seems to be a 2 digit numbber since we are only told up to the tens digit

xy is te number

x=tens digit

y=ones digit

x is one less than 3 times y

x=-1+3y

y has to be a whole/counting number

if y=1

x=-1+3 (1)

x=-1+3

x=2

number could be 21

if y=2

x=-1+3 (2)

x=-1+6

x=5

number could be 52

if y=3

x=-1+3 (3)

x=-1+9

x=8

number could be 83

number could be 21, 52, 83

sum of digits is 11

2+1=3, nope

5+2=7 nope

8+3=11 correct

number is 83

(it could easily be 821 or 452,)

numer is 83