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

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

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

Show that the lines 2x + 5y = 1, x - 3y = 6 and x + 5y + 2 = 0 are concurrent.

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

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

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)

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))

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

Examine the consistency of the system of linear equtions in 1 to 6 5x-y+4z=5 2x+3y+5z=2 5x-2y+6z=-1