Question

А.5. Решите уравнение: 9х - 18| = 27 A) x₁ = -5, X₂ = 1 B) x = -5 C) x = 1 D) x₁ = -1, x₂ =5 E) X₁ = 2, X₂ = 3​

Answer 1

Ответ: -1 ; 5

$|9x - 18| = 27$

$9x - 18 = 27 \\ 9x = 27 + 18 \\ 9x = 45 \\ x = 5$

$9x - 18 = 27 \\ 9x = - 27 + 18 \\ 9x = - 9 \\ x = - 1$