Question

помогите пожалуйста.Нажмите на картинку и увидите примеры.Даю 15 баллов​

Answer 1

a)

$9(x - 1) = x + 15$

$9x - 9 = x + 15$

$9x - x = 15 + 9$

$8x = 24$

$x = 3$

б)

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

$11x + 14 - 5x + 8 = 25$

$11x - 5x = 25 - 14 - 8$

$6x = 3$

$x = \frac{3}{6} = \frac{1}{2}$

в)

$12 - 4(x - 3) = 39 - 9x$

$12 - 4x + 12 = 39 - 9x$

$- 4x + 9x = 39 - 12 - 12$

$5x = 15$

$x = 3$

г)

$2(3x + 5) - 3(4x - 1) = 121$

$6x + 10 - 12x + 3 = 121$

$6x - 12x = 121 - 3 - 10$

$- 6x = 108$

$x = - 18$