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x+1=3 ||x=3
y+2=4 ||y=4
b)
x=x ||2x=2y
y=y ||2x=2y
c)
3=4 ||x+y=1
1=5 ||x+y=3
x + y = 10
x - y = 5
x + y = 28
-x + y = 2
b) 8x + 5y = 3
8x + 10y = 3 + 5y
10x - 5y = 10
5x - 5y = 10 - 5x
c) 3x + y = 3x
5x + y = 10
10x + 1x =y
y = x
x-y=4
2x+y=5
3x-2y +5=2
2x+y=7
b)nieoznaczone:
4x+5y=2
8x+10y=4
3x+2y-5=0
-6x+4y=10
c)sprzeczne
x+y=3
x+y=8
x-y=20
x-y=23