Question

Rezolvați prin metoda reducerii sistemele:
punctul c​

Answer 1

$2x + 3y = - 2 | \: \: \times ( - 3)\\ 3x + 4y = - 1 | \: \: \: \times 2 \\ \\ - 6x - 9y = 6 \\ 6x + 8y = - 2 \\ \\ - y = 4 \\ y = - 4 \\ \\ 6x + 8y = - 2 \\ 6x + 8 \times ( - 4) = - 2 \\ 6x - 32 = - 2 \\ 6x = 30 \\ x = \frac{30}{6} \\ x = 5$

S={5;-4}