zpět
7x + 5y = 5
-3x – 2y = -3
7x = 5 – 5y
x =
-3 – 2y = -3 /·7
-3(5 – 5y) – 14y = -21
-15 + 15y – 14y = -21
y = -21 + 15
y = -6
x = 5