Решение:
а) $$(11z-14)\times38=304$$
$$11z - 14 = 304:38$$
$$11z - 14 = 8$$
$$11z = 8 + 14$$
$$11z = 22$$
$$z = 22:11$$
$$z = 2$$
Ответ: z = 2
б) $$48:(65-z)=12$$
$$65 - z = 48:12$$
$$65 - z = 4$$
$$z = 65-4$$
$$z = 61$$
Ответ: z = 61
в) $$23x + x - 10 = 38$$
$$24x - 10 = 38$$
$$24x = 38 + 10$$
$$24x = 48$$
$$x = 48:24$$
$$x = 2$$
Ответ: х = 2