Rozwiąż układ równań metodą podstawiania.(jeden przykład)
-3x - 4y = -7
6x - y = 32
-y = 32 - 6x
y = -32 + 6x
-3x - 4 * (-32 + 6x) = -7
-3x + 128 - 24x = -7
-27x = -7 - 128
-27x = -135
x = 5
y = -32 + 6 * 5
y = -32 + 30
y = -2
-3x-4y=-7 /*(-2)
6x-y=32
6x+8y=14
6x=14-8y
14-8y-y=32
-9y=32-14
-9y=18 /:(-9)
y=-2
-3x-4*(-2)=-7
-3x+8=-7
-3x=-15 /:(-3)
x=5
spr. -3*5-4*(-2)=-15+8=-7 L=P
6*5-(-2)=30+2=32 L=P
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-3x - 4y = -7
6x - y = 32
-3x - 4y = -7
-y = 32 - 6x
-3x - 4y = -7
y = -32 + 6x
-3x - 4 * (-32 + 6x) = -7
y = -32 + 6x
-3x + 128 - 24x = -7
y = -32 + 6x
-27x = -7 - 128
y = -32 + 6x
-27x = -135
y = -32 + 6x
x = 5
y = -32 + 6 * 5
x = 5
y = -32 + 30
x = 5
y = -2
-3x-4y=-7 /*(-2)
6x-y=32
6x+8y=14
6x-y=32
6x=14-8y
14-8y-y=32
6x=14-8y
-9y=32-14
6x=14-8y
-9y=18 /:(-9)
6x=14-8y
y=-2
-3x-4*(-2)=-7
-3x+8=-7
-3x=-15 /:(-3)
x=5
spr. -3*5-4*(-2)=-15+8=-7 L=P
6*5-(-2)=30+2=32 L=P