2,5x:4целых2/3 =1/2*10

2 5/10x:4 2/3=1/2*10
25/10x:14/3=1*10/2*1
25*14/10*3 x=5
60/6x=5
10x=5
X=5/10=1/2
Ответ:1/2

2,5х :4 2/3 = 1/2 * 10
2,5 х : 4 2/3 =5
2,5 х = 5 * 4 2/3
2,5 х = 5 * 14/3 = 70/3
2  5/10 х = 70/3
х = 70/3 : 2  5/10 = 70/3 : 25/10 = 70/3 * 10/25 = 140/15 = 9  1/3
х = 9  1/3