Answer:
Step-by-step explanation:
150 students van holds 8 students small bus holds 14 students
with only 15 drivers you can only have 15 vehicles
v = vans b = buses
eq 1) v + b = 15
eq 2) 8v + 14b = 150
eq 1) into eq 2) the combined equations
v = 15 - b ----> 8v + 14b = 150 ----> 8(15 - b) + 14b = 150
8(15 - b) + 14b = 150 solve for b
120 - 8b + 14b = 150 collect terms and subtract 120 from both sides
120 -120 + (14 - 6)b = 150 -120
6b = 30
b = 30/6
b = 5
noe find the number of vans
v + b = 15
v = 15 - b
v = 15 - 5
v = 10