Ответ:
- а - 4-19=7
-а =7+23
-а=30
а =-30
7/3-y+5/12=7/4
-y=7/4-33/12
-y=-12/12
-y=-1
Y=1
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Ответ:
- а - 4-19=7
-а =7+23
-а=30
а =-30
7/3-y+5/12=7/4
-y=7/4-33/12
-y=-12/12
-y=-1
Y=1