Question

solve for X and y, ax/b-by/a=a+b , ax-by = 2ab solve by cross multiplication method..plz frnds help me....

Answer 1

a^2x - b^2y = a^2b + ab^2

ax - by = 2ab

ax = by + 2ab
x = (b/a)y + 2b

a^2((b/a)y + 2b) - b^2y = a^2b + ab^2
aby + 2a^2b - b^2y = a^2b + ab^2
(ab - b^2)y = ab^2 - a^2b
y = (ab^2 - a^2b)/(ab - b^2) = ab(b - a)/[b(a - b)] = -a

x = (b/a)(-a) + 2b = -b + 2b = b

x = b, y = -a