X = - 2Y - 6
5*(- 2Y - 6) - 2Y = 12
- 10Y - 30 - 2Y = 12
- 12Y = 42
Y = -3.5
X = -2*(-3,5) - 6 = 7 - 6 = 1
ОТВЕТ: X = 1 Y = - 3.5
2X(2X+3)- (X + Y) = 4X^2 +6X - X - Y = 4X^2 + 5X - Y
X = - 2Y - 6
5*(- 2Y - 6) - 2Y = 12
- 10Y - 30 - 2Y = 12
- 12Y = 42
Y = -3.5
X = -2*(-3,5) - 6 = 7 - 6 = 1
ОТВЕТ: X = 1 Y = - 3.5
2X(2X+3)- (X + Y) = 4X^2 +6X - X - Y = 4X^2 + 5X - Y