Odpowiedź:
a) (x-2y =5
(3x +y =29
-2y=5x
3*(-2y) + y = 29
-6y + y = 29
-5y = 29
y = - 29/5
y = - 5.8
x - 2* (-5.8) = 5
x + 11.6 = 5
x = - 6.6
b) (2x + 4y = 14
( x - y = -2
x= -2 + y
2* (-2 +y) + 4y = 14
-4 + 2y + 4y = 14
6y = 18
y= 3
x - 3 = -2
x = 1