7x - 15y = 2 site x + 2y = 3.

Solve the following pair of equations by substitution method: 7x - 15y = 2 x+2y = 3

7x - 2y = 3 , 22x - 3y = 16 .

Solve the following pair of equations by substitution method : 7x 15 y=2 . . . (1) x+2y=3 . . . (2)

If 7x - 15y = 4x + y , find the value of x: y . Hence, use componendo and dividendo to find the values of : (i) (9x + 5y)/(9x - 5y) (iI) (3x^(2) + 2y^(2))/(3x^(2) - 2y^(2))

7x+15y =2 x-2y=3

Prove that the lines 3x + 2y + z – 5 = 0 = x + y – 2z – 3 and 2x – y – z = 0 = 7x + 10y – 8z – 15 are perpendicular

Simplify : ( 3y ( x - y) - 2x ( y -2x))/( 7x ( x - y) - 3 ( x ^(2) - y ^(2)))

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

(i) 7x^(2) + 16x - 15 = 0 (ii) 5y^(2)+ 8y - 21 = 0

Solve the following pair of linear Equations by the substitution method : 7x-15y=2, x+2y=2 .