Помогите решить! Плиз!!!

9.
(1/6) / (1/27 * 1,4) = (1/6) / (1/108) = 1/6 * 108/1 = 18

10.
(3+4х+12)/2 = 7(2х-3)/14 - 2(1-5х)/14
7(3+4х+12)/14 = (14х-21-2+10х)/14
(21+28х+84-14х+21+2-10х)/14 = 0
128 + 4х = 0
4х= -128
х= -32