Вопрос по математике:

Решите уравнение: 1)х+5/14=5/6 2)4 5/19+х+1 1/38=12 1/2 3)17 3/8-у=9 5/12+2 1/6 4)14 9/16-х=6 3/4+1 2/5

1)х = 5/6 - 5/14;х = (5 * 7 - 5 * 3)/42;х = (35 - 15)/42;х= 20/42;х = 10/21.2)х = 12 1/2 - 4 5/19 - 1 1/38;х = 25/2 - 81/19 - 39/38;х = (25 * 19 - 81 * 2 - 39 * 1)/38;х = (475 - 162 - 39)/38;х = 274/38;х = 137/19;х = 7 4/19.3)у = 17 3/8 - 9 5/12 - 2 1/6;у = 139/8 - 113/12 - 13/6;у = (139 * 3 - 113 * 2 - 13 * 4)/24;у = (417 - 226 - 52)/24;у = 139/24;у = 5 19/24.4)х = 14 9/16 - 6 3/4 - 1 2/5;х = 233/16 - 27/4 - 7/5;х = (233 * 5 - 27 * 20 - 7 * 16)/80;х = (1165 - 540 - 112)/80;х = 513/80;х = 6 33/80.