The sum of the digits of a certain two digit number is 3. when you reverse its digits you decrease the number by 9. what is the number

21

Step-by-step explanation:

Find out all the combinations

3      0 + 3 = 3                             Reversed  30  

12      1 + 2 = 3                                               21

21      2 + 1 = 3                                                12   <

30     3 + 0 = 3                                                3

Then consider what the Question is Asking

And apply it to each of the combinations

Then Use trial and error to find the answer

just do 5.2 + 2 ( 7.2) and 1/3 x 3 (.9) and youv'e got your equation. 0.9( 9/10) + 7.2 ^2 = 16.4 hope i could !

step-by-step explanation: