Rozwiąż układy równań:
a) x + y = 2
x - y = 1
b) x + 2y = -½
3x + 4y = -1
2x=3
x=1,5
1,5+y=2
y=0,5
x + 2y = -½ /*(-2)
-2x-4y=1
3x+4y=-1
x=0
4y=-1
y=-1/4
_______________
b) x + 2y = -½ |*(-2)
______________
0+2y=-1/2
2y=-1/2
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a) x + y = 2
x - y = 1
2x=3
x=1,5
1,5+y=2
y=0,5
x + 2y = -½ /*(-2)
3x + 4y = -1
-2x-4y=1
3x+4y=-1
x=0
4y=-1
y=-1/4
a) x + y = 2
x - y = 1
_______________
2x=3
x=1,5
1,5+y=2
y=0,5
x=1,5
y=0,5
b) x + 2y = -½ |*(-2)
3x + 4y = -1
-2x-4y=1
3x+4y=-1
______________
x=0
0+2y=-1/2
2y=-1/2
y=-1/4
x=0
y=-1/4