(х+5/12)-9/20=11/15
х+5/12=11/15(*4)+9/20(*3)
х+5/12=44/60+27/60
х+5/12=71/60
х=71/60-5/12(*5)
х=71/60-25/60
х=46/60=23/30
Объяснение:
(х+5/12)-9/20=11/15
х+5/12=11/15(*4)+9/20(*3)
х+5/12=44/60+27/60
х+5/12=71/60
х=71/60-5/12(*5)
х=71/60-25/60
х=46/60=23/30
Объяснение: