I believe the answer is -16x+35
1/3 = 2/6, 5/6 - 2/6 = 3/6
The difference is 1/2 of a bottle(or 3/6)
15x7=105 years
9x5=45 years for the boys
105-45=60 so 60years girls
60/6=10 60 years divided by the 6 girls
Mean is 10 years for girls
So the answer would be x=1 and y=-2. Hope this helps
