" 7."(57)/(x+y)+(6)/(x-y)=5;(38)/(x+y)+(21)/(x-y)=9

Solve the following system of equations by method of cross-multiplication: (57)/(x+y)+(6)/(x-y)=5,quad (38)/(x+y)+(21)/(x-y)=9

Solve the following system of equations by method of cross-multiplication: (57)/(x+y)+6/(x-y)=5,\ \ \ (38)/(x+y)+(21)/(x-y)=9

(14)/(x+y)+(3)/(x-y)=5,(21)/(x+y)-(2)/(x-y)=1

Solve the following pairs of equations by reducing them to a linear pair :- 57/(x+y)+6(x-y)=5, 38/(x+y)+21/(x-y)=9 .

Solve by cross-multiplication method. (i) 8x-3y=12,5x=2y +7 (ii) 6x+ 7y -11 =0, 5x+ 2y =13 (iii) (2)/(x)+(3)/(y) =5, (3)/(x) -(1)/(y) +9=0

(x-4)(x-3)=(x-6)(x-5) (y-9)(y-3)= (y-4)(y-3)

Simplify : (i) (5x - 9y) - (-7x + y) (ii) (x^(2) -x) -(1)/(2)(x - 3 + 3x^(2)) (iii) [7 - 2x + 5y - (x -y)]-(5x + 3y -7) (iv) ((1)/(3)y^(2) - (4)/(7)y + 5) - ((2)/(7)y - (2)/(3)y^(2) + 2) - ((1)/(7)y - 3 + 2y^(2))

(x)/(2) - ( y )/(9) = 6, ( x) /( 7) + ( y ) /(3) = 5 .

Find (x+y)div(x-y) if x=(2)/(7),y=(5)/(9)

Factorize each of the following algebraic expressions: 6x(2x-y)7y(2x-y)2r(y-x)+s(x-y)7a(2x-3)+3b(2x-3)9a(6a-5b)-12a^(2)(6a-5b)