rozwiaz układ równań
klamra x+2y=-2
2x-y=1
klamra
x+2y=-2
x = -2 -2y
2*(-2-2y) -y = 1
-4 -4y - y = 1
-5y = 1 +4 /:(-5)
y = 5 : (-5) = -1
x = -2 - 2*(-1) = -2 + 2 = 0
y = -1
x = 0
x + 2y = -2
2x - y = 1 \ *2
2x - 2y = 2
3x = 0
x= 0
0 + 2y = -2
x=0
y=-1
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rozwiaz układ równań
klamra
x+2y=-2
2x-y=1
x = -2 -2y
2*(-2-2y) -y = 1
x = -2 -2y
-4 -4y - y = 1
x = -2 -2y
-5y = 1 +4 /:(-5)
x = -2 -2y
y = 5 : (-5) = -1
x = -2 - 2*(-1) = -2 + 2 = 0
y = -1
x = 0
y = -1
x + 2y = -2
2x - y = 1 \ *2
x + 2y = -2
2x - 2y = 2
3x = 0
x + 2y = -2
x= 0
0 + 2y = -2
x=0
y=-1