1 3/4 : 1/2x = 2 5/8 : 1 1/2
1 3\4 ÷ 1\2х =2 5/8÷ 1 1/2 1 3/4÷1/2х=21/44 7/4*2/1х=21/44 7/2х=21/44 х=21/44*2/7 х=3/22