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RSB [31]
2 years ago
6

Solve the system using elimination 6x-3y=15 and 7x+4y=10

Mathematics
1 answer:
Oxana [17]2 years ago
8 0
6x - 3y = 15.....multiply by 4
7x + 4y = 10....multiply by 3
---------------
24x - 12y = 60 (result of multiplying by 4)
21x + 12y = 30 (result of multiplying by 3)
---------------add
45x = 90
x = 90/45
x = 2

6x - 3y = 15
6(2) - 3y = 15
12 - 3y = 15
-3y = 15 - 12
-3y = 3
y = -3/3
y = -1

solution is (2,-1) <==
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Answer:

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Step-by-step explanation:

Let the number of tablets be 'x'

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According to the given question

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also,

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or

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substituting y from 2 and 3 in equation 1,  we get

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substituting y in equation 3 we get

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or

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and, the number of servers 20

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