3x + 1 = 2(x - 4y) - 3x + 1 = 2x - 8y - 3x - 2x = -8y - x = -8y - 6
2(x + 4y) + 9 = 10y + 12x + 8y + 9 = 10y + 12x - 10y = 6
Подставляем x из первого уравнения во второе:
-8y - 6 - 10y = -18y - 6 = -18y = 1y = -12/1y = -2/3
Теперь находим x:
x = -8*(-2/3) - x = 16/3 - x = 16/3 - 18/x = -2/3
Ответ: x = -2/3, y = -2/3.
3x + 1 = 2(x - 4y) -
3x + 1 = 2x - 8y -
3x - 2x = -8y -
x = -8y - 6
2(x + 4y) + 9 = 10y + 1
2x + 8y + 9 = 10y + 1
2x - 10y = 6
Подставляем x из первого уравнения во второе:
-8y - 6 - 10y =
-18y - 6 =
-18y = 1
y = -12/1
y = -2/3
Теперь находим x:
x = -8*(-2/3) -
x = 16/3 -
x = 16/3 - 18/
x = -2/3
Ответ: x = -2/3, y = -2/3.