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6/(x+y)=7/(x-y)+3, 1/(2(x+y))=1/(3(x-...

`6/(x+y)=7/(x-y)+3`, `1/(2(x+y))=1/(3(x-y))`

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1/(3x+y) + 1/(3x-y) = 3/4 1/(2(3x+y)) - 1/(2(3x-y)) = -1/8

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If (1)/(x) + (1)/(y) = 2 and (3)/(x) + (4)/(y) = 7 , what is the value of (x + y) ?

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RD SHARMA ENGLISH-PAIR OF LINEAR EQUATIONS IN TWO VARIABLES-All Questions
  1. (44)/(x+y)+(30)/(x-y)=10 (55)/(x+y)+(40)/(x-y)=13

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  2. Solve: x+2y+z=7, x+3z=11, 2x-3y=1

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  3. 6/(x+y)=7/(x-y)+3, 1/(2(x+y))=1/(3(x-y))

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  4. Determine graphically the vertices of a trapezium, the equations of ...

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  5. Determine, graphically whether the system of equations x-2y=2,4x-2y=5 ...

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  6. Solve the following system of equations by using the method of elimi...

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  7. Solve the following system of equations: 1/(2x)-1/y=-1 and 1/x+1/(2y)...

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  8. Solve: 4x+6/y=15 6x-8/y=14 and hence find p if y=p x-2

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  9. Solve:3(2u+v)=7u v, 3(u+3v)=11 u v

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  10. Sol v e :1/(2(2x+3y))+(12)/(7(3x-2y))=1/2 7/(2x+3y)+4/(3x-2y)=2 wher...

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  11. Solve: 217 x+131 y=913 131 x+217 y=827

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  12. The area of the triangle formed by the lines 2x+3y=12 ,x-y-1=0 and x=0...

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  13. The students of a class are made to stand in rows. If 3 students are ...

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  14. A wizard having powers of mystic incantations and magical medicines se...

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  15. A railway half ticket costs half the full fare and the reservation cha...

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  16. There are two examination rooms A and B. If 10 candidates are sent fro...

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  17. In a rectangle, if the length is increased by 3 metres and breadth is ...

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  18. On selling a tea-set 5% loss and a lemon-set at 15% gain, a crockery ...

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  19. Draw the graphs of 2x+y=6 and x-y+2=0. Shade the region boun-ded by th...

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  20. Solve the following system of linear equations graphically. 2x-y-4=0,...

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