1) (2x-18/3) + (x+10/6) = (3x-18/4)

4(2x-18) +2(x+10) = 3(3x-18)

8x-72+2x+20=9x-54

10x-52=9x-54

10x-9x=-54+52

x=-2

2) 12=3(1+|x|)

4=1+|x|

-|x| = 1-4

-|x| = 3

|x| = 3

x1=-3

x2=3