1)2 1/3х +3 3/5х + 1/15х=... 2)4 7/9 "умножить на" 3/11 - 3 5/9 "умножить на" 3/11=... 3)3 3/7х - (1 3/14х +8/21х) если х=24 Напишите поскорее!!!Умоляю!!!            
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