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A fruit company delivers its fruit in two types of boxes: large and small.

A delivery of 2 large boxes and з small boxes has a total weight of 78 kilograms. A delivery of 6 large boxes and s small boxes has a total weight of 180 kilograms. How much does each type of box weigh?

User Abierto
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1 Answer

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let's try to understand this.

a fruit company delivers its fruit in two types of boxes: large and small.

DeA group of fruit companies delivers its fruit in two types of boxes: large and small.

You can set x = weight of the large box and y = weight of the small box. Since they tell you 3 large boxes and 5 small boxes have a total weight of 77 kg you can create an equation of 3x+5y = 77. They also tell you that 6 large boxes and 2 small boxes have a total weight of 104 kg so you can write 6x+2y = 104.

Now you have two equations and two unknowns so you can solve using systems of equations.

3x+5y=77

6x+2y=104

You can see that you can easily multiply the first equation by 2 to get a 6x and leave the second equation as is since it also has a 6x so you can subtract the two equations to eventually only have one variable.

6x+10y = 154

-(6x+2y=104)

___________

8y = 50

y = 50/8 = 25/4 kg

Now you solved for the smaller box's weight and you can plug it into any of the two equations above to solve for x.

6x+2(25/4) = 104

6x+25/2=104

6x+25/2 = 208/2

6x = 183/2

x = 183/12 = 61/4 kg (the larger box's weight)

You can check your answer by plugging in these values of x and y into both equations to make sure they still hold.

therefore: x = 183/12 = 61/4 kg (the larger box's weight)

User Mike Ellis
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