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Find the value of x + y, if 12x+13y=29...

Find the value of `x + y`, if
`12x+13y=29` and
`13x+12y=21`

A

`|{:(3," "4),(1,-2):}|`

B

`|{:(8," "4),(5,-2):}|`

C

`|{:(" "4,8),(-2,5):}|`

D

`|{:(3,8),(1,5):}|`

Text Solution

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The correct Answer is:
B, D
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CHETAN PUBLICATION-LINEAR EQUATIONS IN TWO VARIABLES -Problem Set - 1
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  2. The general form of linear equation in two variables is ........

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  3. Solve the following simultaneous linear equations in two variables by ...

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  4. Find the value of x + y, if 12x+13y=29 and 13x+12y=21

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  5. Express the following in following in the mathematical form using x an...

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  6. Find the value of D(x), for solving the simultaneous equations 3x+4y=8...

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  7. ........ Is the solutions of given simultaneous equations x-y=7,x+y=1...

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  8. Solve the following simultaneous linear equations in two variables by ...

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  9. Solve the following simultaneous linear equations in two variables by ...

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  10. x+3y = -4 ; 5x-7y=68

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  11. The pair of simultaneous equations from the following is .......... ...

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  12. The equation of X-axis is of the form

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  13. The Co-ordinates of the point of origin are .....

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  14. If the value of the determinant |{:(m,-2),(2," "1):}| is 7 then valu...

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  15. The perimeter of rectangle is 64, is expressed in the mathematical equ...

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  16. The value of determinant |{:(5,2),(7,4):}| is ......

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  17. If D(x)=-18 and D = 3 are values of determinant for certain simulta...

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  18. If the value of determinant |{:(m,2),(-5,7):}| is 31, find the value o...

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  19. If (a, 3) is point lying on graph of equation 5x+2y=-4 then a = .......

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  20. The simultaneous equations 3x+5y = 16 and 4x- y = 6 have .........

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