Rozwiąż układ równań metodą podstawiania.
[2x+y=5
[2(x-3)-6y=6
[2x+y=5] [2(x-3)-6y=6] y=5-2x 2x-6-6y=6 y=5-2x 2x-6y=12 y=5-2x 2x-6(5-2x)=12 y=5-2x 2x-30+12x=12 y=5-2x 14x=42 y=5-2x x=3 y=5-2*3 x=3 y= -1 x=3
y = -2x +5
2x - 6 - 6y = 6
y= -2x + 5
2x - 6 ( -2x + 5 ) = 12
2x + 12 x -30 = 12
y = - 2x +5
14 x = 42 / 14
y = -2x + 5
x = 3
y = - 6 + 5
x=3
y = -1
x= 3
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[2x+y=5]
[2(x-3)-6y=6]
y=5-2x
2x-6-6y=6
y=5-2x
2x-6y=12
y=5-2x
2x-6(5-2x)=12
y=5-2x
2x-30+12x=12
y=5-2x
14x=42
y=5-2x
x=3
y=5-2*3
x=3
y= -1
x=3
y = -2x +5
2x - 6 - 6y = 6
y= -2x + 5
2x - 6 ( -2x + 5 ) = 12
y = -2x +5
2x + 12 x -30 = 12
y = - 2x +5
14 x = 42 / 14
y = -2x + 5
x = 3
y = - 6 + 5
x=3
y = -1
x= 3