Question

Решите уравнения 1) 3/5х+2/15х=10 , 2) (2/3+5/7х)*21=29 , 3) 4 1/3х–2 2/3х=5​

Answer 1

Ответ:

Пошаговое объяснение:

1) 3/5*x + 2/15*x = 10

9/15*x + 2/15*x = 10

11/15*x = 10

x = 10*15/11 = 150/11 = (143+7)/11 = 13 7/11

2) (2/3 + 5/7*x)*21 = 29

(14/21 + 15/21*x)*21 = 29

14 + 15x = 29

15x = 29 - 14 = 15

x = 15/15 = 1

3) (4 1/3)*x - (2 2/3)*x = 5

13/3*x - 8/3*x = 5

5/3*x = 5

x = 5*3/5 = 3