2 3/10а - 1 2/3а= 23/10а-5/3а=69/30а-50/30а=19/30а
Если а=6, то 19/30*6=19/5=3 4/5
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2 3/10а - 1 2/3а= 23/10а-5/3а=69/30а-50/30а=19/30а
Если а=6, то 19/30*6=19/5=3 4/5