Question

Найдите корень уравнения

Answer 1

$9(x - 1) = x + 15 \\ 9x - 9 = x + 15 \\ 9x - x = 15 + 9 \\ 8x = 24 \\ x = 3$

$12 - 4(x - 3) = 39 - 9x \\ 12 - 4x + 12 = 39 - 9x \\ - 4x + 9x = 39 - 12 - 12 \\ 5x = 15 \\ x = 3$

(11x +14)-(5x-8) =25

11x + 14 - 5x+8 = 25

6x=25-14-8

6x=3

x=0.5

Answer 2

Извините за почерк.Помогла?Сама не рада.