3 years ago

Pens and Pencils

1 answer:

6 0

Pen=x
Pencil=y
y+0.15=x
y+x=0.69
y+y+0.15=0.69
2y=0.69-0.15
2y=0.54
y=0.54/2
y=0.27 pencils
y+0.15=x
0.27+0.15=x
0x=0.42 pen
150 pencils x0.27=40.5$
225 pens x 0.42=94.5$
Total 40.5$ + 94.50$=135 $
Supplier is right about a priče.

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spayn [35]

Let the weight of Paula's dog be x
Let the weight of Carla's dog be y

We know that the weight of Paula's dog is 3 times that of Carla's dog, therefore:
x = 3y ...........> equation I

We also know that the sum of the weights is 48 pounds, therefore:
x + y = 48 ............> equation II

Substitute with equation I in equation II:
3y + y = 48
4y = 48
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Substitute with the value of y in equation I:
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Based on the above calculations:
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