Odpowiedzi

2009-06-28T08:49:46+02:00
X - 3y = -5 I +3y
2x + 5y = 1

x = -5 + 3y
2 (-5 + 3y) + 5y = 1

x = -5 + 3y
-10 + 6y +5y = 1

x = -5 + 3y
-10 + 11y = 1 I +10

x = -5 + 3y
11y = 11 I /11

x = -5 + 3y
y = 1

x = -5 + 3*1
y = 1

x = -2
y = 1