(x+57):7=12
х+57=12*7
х+57=84
х=84-57
х=27
(161-Y):16=9
161-y=9*16
161-y=144
161-144=y
y=17
112:(17+x)=4
112=68+4х
4х=44
х=11
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(x+57):7=12
х+57=12*7
х+57=84
х=84-57
х=27
(161-Y):16=9
161-y=9*16
161-y=144
161-144=y
y=17
112:(17+x)=4
112=68+4х
4х=44
х=11