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Ответ:

( 2х -1,5) : 1/7 = 1 2/3 : 5/14

( 2х -1,5) : 1/7 = 4 2/3

2х -1,5 = 4 2/3 • 1/7

2х -1,5 = 2/3

2x - 1 5/10 = 2/3

2x = 2/3 + 1 5/10

2x = 2 1/6

x = 2 1/6 : 2

x = 1 1/12