Ответы на вопрос:
(50х-85)/9+48=83
50/9-85/9+48=83
5 5/9х-9 4/9+48=83
5 5/9х=83-48+9 4/9
5 5/9х=44 4/9
х=8
222-(560/у+43)=99
222-560/у-43=99
560/у=99-222+43
560/у=-80
у=-80/560
у=-1/7
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