2*x + y = 4
2 2 x + y = 5
1
2
2.2
-0.4
x1 = 1.00000000000000 y1 = 2.00000000000000
x2 = 2.20000000000000 y2 = -0.400000000000000
x3 = 0.9999999999999112 y3 = 2.000000000000178