1) 8х+(123:11)=15
88х+123=165
88х=42
х=21:44
2)
((76:9)х-х):20=7:40
((76х-9х):9):20=7:40
(67:180)х=7:40
х=63:134
3)
44:(х-39:4)=22:13
(х-39:4)=44:(22:13)
х-39:4=26
х=(39:4)+26
х=143:4
1) 8х+(123:11)=15
88х+123=165
88х=42
х=21:44
2)
((76:9)х-х):20=7:40
((76х-9х):9):20=7:40
(67:180)х=7:40
х=63:134
3)
44:(х-39:4)=22:13
(х-39:4)=44:(22:13)
х-39:4=26
х=(39:4)+26
х=143:4