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Dmitry [639]
3 years ago
10

15 7/8 - 5 3/4

Mathematics
1 answer:
dem82 [27]3 years ago
8 0
First, set ur denominator to lcm which is 8

15 7/8-5 6/8

= 10 1/8
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Sam wants to buy 8 pencils and 6 pens, which cost a total of $8.50. He realizes he doesn't have enough cash and instead takes on
Diano4ka-milaya [45]
X = pencils, y = pens

8x + 6y = 8.50
4x + 4y = 5.....multiply by -2
----------------
8x + 6y = 8.50
-8x - 8y = -10 (result of multiplying by -2)
-----------------add
-2y = - 1.50
y = -1.50 / -2
y = 0.75 <=== pens cost 0.75

4x + 4y = 5
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4x = 5 - 3
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3 years ago
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TiliK225 [7]

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Step-by-step explanation:

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3 years ago
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Step-by-step explanation:

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