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Question

Twice a number minus three times another is equal to 2. The sum of these numbers is 11. The difference of these numbers is

A
2
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B
4
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C
3
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D
5
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Solution

The correct option is C 3
2x3y=2
(x+y=11)2
2x+2y=22
+2x3y=2
()(+)()––––––––––
5y=20
or y=4
x=114
or x=7
Hence, xy=74=3.

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