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Solve each of the following pairs of equ...

Solve each of the following pairs of equations by reducing them to a pair of linear equations. `(10)/(x+y)+(2)/(x-y)=4` and `(15)/(x+y)-(5)/(x-y)=-2`

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BEYOND PUBLICATION-MODEL PAPER-EXERCISE
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  9. If A - {x|x is a prime number and x < 20} B = {x|2x + 1, x in w and x<...

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  10. If A = {x//x is a prime number and x<20 } then B = {x//2x+1, x in w ...

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  11. If A = {x//x is a prime number and x<20 } then B = {x//2x+1, x in w ...

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  14. The H.C.F of 31, 43 and 47 is…………

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  15. If x+y+z =xyz, then sum(2x)/(1-x^(2))=

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  17. If a fraction becomes 2 when 9 is added to its numerator and 1 when 2 ...

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  18. The sum of squares of two consecutive positive even numbers is 340, th...

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  19. Which term of G.P. 3, 3sqrt(3), 9, ……. equals to 243?

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  20. If sqrt a + sqrt b is an irrational number, then which of the followin...

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