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UkoKoshka [18]
3 years ago
7

How many of each type of box is it carrying?

Mathematics
2 answers:
CaHeK987 [17]3 years ago
8 0

Answer:

Number of large boxes: 55

Number of small boxes:65

Step-by-step explanation:

Let be "l" the number of large boxes and "s" the number of small boxes.

Set up a system of equations:

\left \{ {{l+s=120} \atop {60l+30s=5250}} \right.

Use the methof of elimination. Mulitply the first equation by -60 and add both equations. Then solve for "s":

\left \{ {{-60l-60s=-7200} \atop {60l+30s=5250}} \right.\\.........................\\-30s=-1950\\s=65

Substitute s=65 into any of the original equations and solve for "l":

l+65=120\\l=55

garri49 [273]3 years ago
6 0

<u>Answer:</u>

Number of large boxes = 55

Number of small boxes = 65

<u>Step-by-step explanation:</u>

We know that large boxes weight 60 pounds each while small boxes weight 30 pounds each and they are 120 boxes in total which weigh 5250 pounds in total.

Assuming l to the number of large boxes and s to be the number of small boxes, we can write the following equations:

l+s=120 --- (1)

60l+30s=5250 --- (2)

From equation (1):

l=120-s

Substituting this value of l in (2):

60(120-s)+30s=5250

7200-60s+30s=5250

60s-30s=7200-5250

30s=1950

s = 65

Now finding the value of s:

l=120-65

l = 55

Therefore, number of large boxes = 55 and number of small boxes = 65.

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