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a) 3x = y + 4
1/3y = x + 2
3x - 1y = 4
-1x + (1/3) y = 2
W= 3*(1/3) - (-1)* (-1)= 1-1=0
Wx= 4*(1/3) - 2*(-1)= 4/3 +2 = 3 (1/3)
układ sprzeczny, brak rozwiązań.
b) 1/2x - 3 = 2y
8y = 2x - 12
(1/2)x - 2y = 3
-2x + 8y = -12
W= (1/2)*8 - (-2)*(-2)= 4-4= 0
Wx= 3*8 - (-12)* (-2)= 24-24= 0
Wy= (1/2)*(-12) - (-2)*3= -6+6=0
nieskończenie wiele rozwiązań.