Jack, Luka, and Tony took a quiz. Luka's score was 12 less than Tony's score and 3 times Jack's score. If Jack's score was 1/9 of Tony's sco

Let Luka's score be x

Then Tony's score  =  x + 12

And Jack's score = x / 3

And  Jack's score was 1/9th of Tony's....so...

Nine times Jack's score = Tony's  .....so....

9(x/3) =  x + 12     simplify

3x = x + 12     subtract x from both sides

2x = 12     divide both sides by 2

x = 6

And Tony's score is x + 12 = 6 + 12  = 18