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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)`

Text Solution

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The correct Answer is:
A
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BAL BHARTI-LINEAR EQUATIONS IN TWO VARIABLES-PROBLEM SET - 1
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  2. For simultaneous equations in variables x and y, Dx=49,Dy=-63, D=7 the...

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  3. Choose correct alternative for each of the following questions Find ...

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  4. Choose the correct alternative for each of the following questions: T...

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  5. Choose correct alternative for each of the following questions ax +...

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  6. Solve the following simultaneous equations graphically. 2x + 3y = ...

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  7. Solve the following simultaneous equations graphically. x - 3y = ...

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  8. Solve the following simultaneous equations graphically. 5x - 6y + 30 ...

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  9. Solve the following simultaneous equations graphically. 3x - y - 2...

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  10. Solve the following simultaneous equations graphically. 3x + y = 10...

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  11. Find the values of each of the following determinants. |(4,3),(2,7)...

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  12. Find the values of each of the following determinants. |(5,-2),(-3,...

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  13. Find the values of each of the following determinants. |(3,-1),(1,4...

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  14. Solve the following equations by Cramer’s method. 6x - 3y = -10 , ...

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  15. Solve the following equations by Cramer’s method. 4m - 2n = -4 , 4m...

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  16. Solve the following equations by Cramer’s method. 3x - 2y = (5)/(2)...

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  17. Solve the following equations by Cramer’s method. 7x + 3y = 15 , 12...

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  18. Solve the following equations by Cramer’s method. (x + y - 8)/(2) =...

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  19. Solve the following simultaneous equations. (2)/(x) + (2)/(3y) = (1...

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  20. Solve the following simultaneous equations. (7)/(2x + 1) + (13)/(y ...

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