Предмет: Математика, автор: Аноним

Решите уравнение: а)2/3x+4/9x=2,3

б)5/12x-4/15x=0,51

в)x-0,2x=8/15

Ответы

Автор ответа: Леонидович
0

а)2/3x+4/9x=2,3

10/9х=23/10

х=23/10 : 10/9

х=207/100

ответ: 207/100

б)5/12x-4/15x=0,51

25/60х - 16/60х = 51/100

3/20х=51/100 / *20

3х=51/5

х=51/15

ответ: 51/15

в)x-0,2x=8/15

х - 1/5х=8/15

4/5х=8/15

х=8/15 : 4/5

х= 2/3

ответ: 2/3

 

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