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1 - (y-2) = 2(x+1)
x - y = 2
1 - y + 2 = 2x + 2
x - y = 2
- y + 3 = 2x + 2
x - y = 2
- y - 2x = - 1
- y + x = 2 /*2
- y - 2x = -1
- 2y + 2x = 4
(+)-------------------
- 3y = 3
y = -1
y = -1
1 + x = 2
y = -1
x = 1
Metoda podstawiania:
1 - (y-2) = 2(x+1)
x - y = 2
1 - y + 2 = 2x + 2
x - y = 2
- y + 3 = 2x + 2
x - y = 2
x = 2 + y
- y - 2x = - 1
- y - 2(2+y)= -1
x = 2 + y
- y - 4 - 2y = -1
x = 2 + y
- 3y = 3
y = - 1
x = 2 - 1
y = -1
x = 1
y = -1
Metoda wyznaczników:
patrz załącznik