Дроби 1целая 1/3х + 5/6х= 2 целых 1/2 + 7/12- 4 целых 1/4

1 1/3х + 5/6х = 2 1/2 + 7/12 - 4 1/4
(4 * 4)/(3х * 4) + (5 * 2)/(6х * 2) = (5 * 6)/(2 * 6) + 7/12 - (17 * 3)/(4 * 3)
(16 +10)/12х = (30 + 7 - 51)/12
26/12х = -14/12
26 * 12 = - 14 * 12х
 26 = 14х
1 12/14 = х
1 6/7 = х