Решите уравнение:а)(х+5/12)-9/20=11/15; б)(х+4/25)-21/50=34/75

а) (х + 5/12) - 9/20 = 11/15;

х + 5/12 = 11/15 + 9/20;

х + 5/12 = (11 * 4 + 9 * 3)/60;

х + 5/12 = (44 + 27)/60;

х + 5/12 = 71/60;

х = 71/60 - 5/12;

х = (71 * 1 - 5 * 5)/60;

х = (71 - 25)/60;

х = 46/60;

х = 23/30.

Ответ: 23/30.

б) (х + 4/25) - 21/50 = 34/75;

х + 4/25 = 34/75 + 21/50;

х + 4/25 = (34 * 2 + 21 * 3)/150;

х + 4/25 = (68 + 63)/150;

х + 4/25 = 131/150;

х = 131/150 - 4/25;

х = (131 * 1 - 4 * 8)/150;

х = (131 - 32)/150;

х = 99/150;

х = 33/50.

Ответ: 33/50.