Answer:
- 68 is the answer.............
On my screen this projects wayyy too bright but to find this answer you need to count every square unit and if it's a half then add it to another half.
There are 10 digits 0 1 2 3 4 5 6 7 8 9 if we can't use 0 and 1 then there are only 8 choices for the first digit and only 2 choices for the second digit and 10 for the third so there are 8*2*10 =160 possibilities.
X - 9 = 8
x - 9 +9 = 8 +9
x = 17
x = 17