В) 2x - 3/5 = 9/10 г) x+3/2 = 3x - 2/7

Question

В) 2x - 3/5 = 9/10

г) x+3/2 = 3x - 2/7

Answer 1

в) 2х - 3/5 = 9/10                  г) х + 3/2 = 3х - 2/7

2х = 9/10 + 3/5                     3/2 + 2/7 = 3х - х

2х = 9/10 + 6/10                   21/14 + 4/14 = 2х

2х = 15/10                            25/14 = 2х

х = 15/10 : 2                         х = 25/14 : 2

х = 15/10 * 1/2                      х = 25/14 * 1/2

х = 15/20                               х = 25/28

х = 3/4