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If 3 x + 5y + 7 z = 49 and 9 x + 8y + ...

If ` 3 x + 5y + 7 z = 49 and 9 x + 8y + 21 z = 126 ` , then what is the value of y ?

A

4

B

2

C

3

D

5

Text Solution

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The correct Answer is:
C
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