He played 5% if im correct
14 loaves per hour
15 hours will get 14×15 = 210loaves
A)37 because is a prime number just sear up prime numbers on google
You can reword the equation 6x+y=9 to
Y=6x+9
Then plug-in y=6x+9 into the equation 2x+3y=-5
Plug this 2x+3(6x+9)=-5
2x+18x+27=-5
Then solve it from there