Oie, Td Bom?!
{2x + 3y = 9 ⇒ x = 9/2 - 3/2 y
{4x - 5y = 7
• 4x - 5y = 7
4(9/2 - 3/2 y) - 5y = 7
18 - 6y - 5y = 7
18 - 11y = 7
- 11y = 7 - 18
- 11y = - 11 . (- 1)
11y = 11
y = 11/11
y = 1
• x = 9/2 - 3/2 y
x = 9/2 - 3/2 . 1
x = 9/2 - 3/2
x = [9 - 3]/2
x = 6/2
x = 3
S = {(x , y) = (3 , 1)}
Att. Makaveli1996
