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Question

In the following, find the co-ordinates of the point whose abscissa is the solution of the first equation and ordinate is the solution of the second equation :
32x=7;2y+1=10212y.

A
(2,2)
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B
(4,2)
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C
(2,2)
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D
(4,2)
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Solution

The correct option is A (2,2)
First equation:
32x=7
=>2x=37=4
=>x=2

Second equation:
2y+1=102
12y

=>2y+1=1052y
=>2y+52 y=101
=>92 y=9
=>y=2
Hence, required point =(x,y)=(2,2)

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