Предмет: Математика, автор: k12349004069012

3. Розв'яжи рiвняння.
А) 2/3х + 4/9х= 3,2
Б)х-0,2=8/15
даю 50 балів​

Ответы

Автор ответа: Пеппер
12

Пошаговое объяснение:

А) 2/3х + 4/9х = 3,2

6х/9 + 4х/9 = 3,2

10х/9 = 3.2

10х=28,8;  х=2,88

Б) х-0,2=8/15

х=8/15 + 1/5

х=8/15 + 3/15 = 11/15

k12349004069012: дякую
Автор ответа: iramazurk
2

Пошаговое объяснение:

а)

2/3х + 4/9х = 3,2

6/9х + 4/9х = 3,2

10/9х = 32/10

х = 32/10 : 10/9

х = 32/10 * 9/10

х = 16/10 * 9/5

х = 144/50

х = 2,88

б)

х - 0,2 = 8/15

х - 2/10 = 8/15

х = 8/15 + 2/10

х = 16/30 + 6/30

х = 22/30

х = 11/15

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