-16.6x+5y=7x+3y+1=2(x+6y-1)

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

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

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

Simplify: (2x + 5y)(3x + 4y) - (7x + 3y)(2x + y)

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

Solve the following system of equations: (1)/(7x)+(1)/(6y)=3,quad (1)/(2x)-(1)/(3y)=5

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

Solve the following system of equations by matrix method : 5x+7y+2=0 4x+6y+3=0 5x+2y=3 3x+2y=5 3x+4y-5=0 x-y+3=0 3x+y=19 3x-y=23 3x+7y=4 x+2y=-1 3x+y=7 5x+3y=12