Ответы и объяснения

  • Участник Знаний
2013-05-23T11:45:50+04:00

6X + 4Y + 9 = 4X + 21

2X + 4Y - 12 = 0

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2X + 10 = 3 - 6X - 5Y

8X + 5Y + 7 = 0

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2*(X + 2Y - 6) = 0

X = 6 - 2Y

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8*(6-2Y)+5Y + 7 = 0

48 - 16Y + 5Y + 7 = 0

- 11 Y = - 55

Y = - 5

X = 6 -2*(-5) = 6 + 10 = 16