Question

1) (х+312):38=102
2) (239-х)*38=3876
3) 26*(х+427)=15756
4) 22374:(х-125)=1243
5) 1.8+х-2.3=3.7+4х
6) 5.2-х+1.9=5.9-3х

Answer 1

1) х+312 = 102*38     2) 239-х = 3876:38     3) х+427 = 15756:26

    х+312 = 3876           239-х = 102                 х+427 = 606

    х = 3876-312            х = 239-102                 х = 606-427

    х = 3564                    х = 137                        х = 179

4) х-125 = 22374:1243     5) х-0,5 = 3,7+4х        6) 7,1-х = 5,9-3х

     х-125 = 18                       х-4х = 3,7+0,5             -х+3х = 5,9-7,1

     х = 18+125                      -3х = 4,2                         2х = -1,2

     х = 143                               х = -1,4                          х = -0,6