Question

реши уравнение 1376:(34-х)=86

9680:(х+219)=16

(х-57):29=205

(х-72)*9=927

Answer 1

1. 650/(х+219)=1
650=х+219
х=650-219=386

Answer 2

1376:(34-х)=86
34-х=1376:86
34-х=16
х=16-34
х=-18
________________
9680:(х+219)=16
х+219=9680:16
х+219=605
х=605-219
х=386
________________
(х-57):29=205
х-57=205*29
х-57=5945
х=5945+57
х=6002
________________
(х-72)*9=927
х-72=927:9
х-72=103
х=103+72
х=175
 Не за что)))