Question

найдите решение систем уравнений.​

Answer 1

Ответ:

$\left \{ {{3(x - 2) - 2(y + 1) = - 1} \atop {5(x + 3) - 8(y - 2) = 45} } \right. \\ \\ \left \{ {{3x - 6 - 2y - 2 = - 1} \atop {5x + 15 - 8y + 16 = 45} } \right. \\ \\ \left \{ {{3x - 2y = 7} \atop {5x - 8y = 14} } \right. \\ \\ \left \{ {{x = \frac{7 + 2y}{3} } \atop {5x - 8y = 14} } \right. \\ \\ 5 \times \frac{7 + 2y}{3} - 8y = 14 \: \: \: | \times 3 \\ 5(7 + 2y) - 24y = 42 \\ 35 + 10y - 24y = 42 \\ - 14y = 7 \\ y = - \frac{1}{2} \\ \\ x= \frac{1}{3} (7 + 2 \times ( - \frac{1}{2} ) = \frac{7 - 1}{3} = 2$

Ответ:

(2; -0,5)