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-x+7y=-1
3x-y=2
-x+7y=-1 /*3
-3x + 21y = -3
3x - y = 2
------------------
20y = -1
y = -1/20
3x - (-1/20) = 2
3x + 1/20 = 2
3x = 2 - 1/20
3x = 1 i 19/20
3x = 39/20
x = 39/20 * 1/3
x = 13/20
Układ posiada 1 rozwiazanie.
-x = -1-7y /*(-1)
x=1+7y
3*(1+7y)-y=2
3+21y-y=2
20y=2-3
20y=-1
y=-1/20
x=1+7*(-1/20)
x=1-7/20
x=13/20
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-x+7y=-1 /*3
3x-y=2
-3x + 21y = -3
3x - y = 2
------------------
20y = -1
y = -1/20
3x - y = 2
3x - (-1/20) = 2
3x + 1/20 = 2
3x = 2 - 1/20
3x = 1 i 19/20
3x = 39/20
x = 39/20 * 1/3
x = 13/20
x = 13/20
y = -1/20
Układ posiada 1 rozwiazanie.
-x+7y=-1
3x-y=2
-x = -1-7y /*(-1)
x=1+7y
3*(1+7y)-y=2
3+21y-y=2
20y=2-3
20y=-1
y=-1/20
x=1+7*(-1/20)
x=1-7/20
x=13/20