Question

помогите пожалуйста ​

Answer 1

$- 2x = - 20 \\ x = - 20 \div ( - 2) \\ x = 10$

$(x - 4)(x + 4) = 0 \\ x _{1} = 4 \\ x_{2} = - 4$

$3(x + 8) = 12 \\ x + 8 = 4 \\ x = 4 - 8 \\ x = - 4$

$x - 4 = 6 \\ x = 6 + 4 \\ x = 10$

Ответ D) А и Г