2x+y=7

Question

x(2)-xy=6

pl plz help me someone

Answer 1

substitute y=7-2x and you have

x^2 - x(7-2x) = 6
x^2 - 7x + 2x^2 - 6 = 0
3x^2 - 7x - 6 = 0
(3x+2)(x-3) = 0

x = 3 or -2/3
so, y = 1 or 25/3