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For simultaneous equations in variables x and y, `D_x=49,D_y=-63`, D=7 then what is x? a) 7 b) -7 c) 1/7 d) -1/7

A

7

B

-7

C

`1/7`

D

`-1/7`

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CHETANA PUBLICATION-Linear equations in two variables-EXERCISE
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  17. The co-ordinates of the point of origin are……………a)(0,0) b)(1,0) c)(0,1...

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  20. The value of determinant |(5,2),(7,4)| is…………..a)6 b)-6 c)34 d)-34

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