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5x-y=4
x - y = 0
5x - y = 4 x(-1) (pomnożyć przez -1)
x - y = 0
-5x + y = 4
+----------------
-4x = 4 /(-4)
x = 1
x = 1
1 - y = 0
x = 1
-y = -1 x(-1) (pomnożyć przez -1)
x = 1
y = 1
b) 5y-x=3
x=3-y
5y - x = 3
y + x = 3
+------------
6y = 6 /6
y = 1
5 - x = 3
y = 1
-x = -2 x(-1) (pomnożyć przez -1)
y = 1
x = 2
y = 1
Proszszsz :p