There were 10 small boxes shipped and 12 large boxes shipped.
Step-by-step explanation:
Given,
Weight of each small box = 35 pounds
Weight of each large box = 85 pounds
Total boxes = 22
Total weight of shipment = 1370 pounds
Let,
Number of small boxes = x
Number of large boxes = y
According to given statement;
x+y=22 Eqn 1
35x+85y=1370 Eqn 2
Multiplying Eqn 1 by 35
[tex]35(x+y=22)\\35x+35y=770\ \ \ Eqn\ 3\\[/tex]
Subtracting Eqn 3 from Eqn 2
[tex](35x+85y)-(35x+35y)=1370-770\\35x+85y-35x-35y=600\\50y=600[/tex]
Dividing both sides by 50
[tex]\frac{50y}{50}=\frac{600}{50}\\y=12[/tex]
Putting y=12 in Eqn 1
[tex]x+12=22\\x=22-12\\x=10[/tex]
There were 10 small boxes shipped and 12 large boxes shipped.
Keywords: linear equation, elimination method
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