(1 5/12 - 2x) : 1 1/2 = 2/3;
(1 5/12 - 2x) : 3/2 = 2/3;
1 5/12 - 2x = 2/3 * 3/2;
1 5/12 - 2x = 1;
2x = 1 5/12 - 1;
2x = 5/12;
x = 5/24;
(1 5/12 - 2x) : 1 1/2 = 2/3;
(1 5/12 - 2x) : 3/2 = 2/3;
1 5/12 - 2x = 2/3 * 3/2;
1 5/12 - 2x = 1;
2x = 1 5/12 - 1;
2x = 5/12;
x = 5/24;