Решите уравнения дам 20 баллов. 1). 11*(211-х)=132. 2.)    23,62х+21,38х=135,9. 3). 2,8*46-5х=29,4. 4). 3,47х-7,83+2,93х=9,45.  Если можно 2 и 4 уранение
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