Question

Solve the simultaneous equations.
2x + y=120
x + y=70

Answer 1

(50, 20)

Explanation:

y = -2x + 120

x + (-2x+120) = 70

-x = -50

x = 50

y = -2x+120

y = -2(50)+120 = 20

{x,y} = {50,20}