[" 30."(44)/(x+y)+(30)/(x-y)=10],[(55)/(x+y)+(40)/(x-y)=13]

s solve the following pairs of equation for x andy (15)/(x-y)+(22)/(x+y)=5 and (40)/(x-y)+(55)/(x+y)=13

Solve the following simultaneous equation: 30/(x-y)+44/(x+y)=10, 40/(x-y)+55/(x+y)=13 .

Solve the following simultaneous equations: 30/(x-y)+44/(x+4)=10 ,40/(x-y) +55/(x+y)=13

Solve for x,y(5)/(x)+(3)/(y)=30 and (9)/(x)-(5)/(y)=2

Solve each of the following pairs of equations by reducing them to a pair of linear equations. 30/(x-y)+44/(x+y)=10 40/(x-y)+55/(x+y) = 13

Find the square root of the expression (4x^2)/(y^2)+(20x)/(y)+13-(30y)/(x)+(9y^2)/(x^2)- (2x)/(y)+5-(3y)/(x) .

Solve :(x+y)(x+y+z)=18,(y+z)(x+y+z)=30,(x+z)(x+y+z)=2

Solve the following pairs of equations by reducing them to a linear pair :- 44/ (x+y)= 30/ (x-y)=10 , x+y ne 0, x-y ne 0 .

If [(4,9),(3,0)]=[(x,y^(2)),(3,0)] then (x,y)=

Find Cov (x,y) for the following pair of observations, given bar(x) = 30, bar(y) = 40 , (15,44), (20,43), (25, 45), (30, 37), (40,34), (50,37)