" 16."6x+5y=7x+3y+1=2(x+6y-1)

If (3x -4y) : (2x -3y) = (5x -6y) : (4x -5y) , find : x : y .

6x - 5y - 16 = 0 , 7x - 13 y + 10 = 0 .

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

Find the value fo x:y, if (7x - 15y)/(4x + 6y) = (5)/(6).

Solve for x and y : (1)/( 7x ) + ( 1) /( 6y) = 3, (1)/( 2x) - (1)/( 3y ) = 5 (x ne 0, y ne 0)

Evaluate : (vi) (1.6 x + 0.7y) (1.6 x - 0.7y)

Add the algebraic expressions: 4x y^2-7x^2y ,\ 12 x^2y-6x y^2,\ -3x^2y+5x y^2

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

If x=5 and y=-2 , then find the value of (i) (8x-2y+5)/(2x+4ty+12) " "(ii) (5x-6y-7)/(3x+6y+12)