Answer:
7 pickles, 3 watermelons
Step-by-step explanation:
p = number of pickles purchased
w = number of watermelons purchased
p + w = 10
8.99p + 7.49w = 85.40
Multiply the first equation by 7.49
7.49p + 7.49w = 74.90
Subtract the new first equation from the second
(8.99p - 7.49p) + (7.49w - 7.49w) = 85.40 - 74.90
1.50p = 10.5
p = 10.5/1.5
p = 7
Substitute p into the first equation to find w
p + w = 10
7 + w = 10
w = 10 - 7
w = 3
Check it using the second equation
8.99(7) + 7.49(3) = 85.40
