Answer :
Answer:
Large box weight is 55 pounds
Small box weight is 35 pounds
Step-by-step explanation:
Let large box weight = x
Let small box weight = y
The combined weight of a large box and a small box is 90 pounds =>
x+y =90
y = 90 - x
70x + 50y = 5600
70x + 50(90 - x) = 5600
70x + 4500 - 50x = 5600
70x - 50x = 5600 - 4500
20x = 1100
x = 55
y = 90 - 55
y = 35
Large box weight = 55 pounds
Small box weight = 35 pounds