+421 Pepperoni=P
Mushrooms=M
Sausage= S
Green Peppers=G
Onions= O
C=cheese
Note that all of these pizzas have cheese.
1.P+M+C=14.67
2.P+M+S+G+C=17.85
3.P+M+S+G+O+C=19.44
Subtract equations 2 from 3 and get Onions=$1.59.
Then you can't find out any more, as this is a pizza estimation problem that has too many variables and I don't eat pizza soooooo...
