Question

Решить уравнения : х - 18 1/3 = 2 7/15; 3 9/14 + (х - 2 3/7) = 7 23/28.

Answer 1

Ответ:

1.

x - 18 1/3 = 2 7/15

x = 2 7/15 + 18 1/3

x = 2 7/15 + 55/3

x = 2 7/15 + 275/15

x = (30 + 275)/15

x = 305/15

x = 20 1/3

2.

3 9/14 + (x - 2 3/7) = 7 23/28

3 9/14 + x - 2 3/7 = 7 23/28

x + 3 9/14 - 2 3/7 = 7 23/28

x + 3 9/14 - 2 3/7 = 7 23/28

x = 7 23/28 - 3 9/14 + 2 3/7

x = 201/28 - 81/14 + 37/7

x = 201/28 - 162/28 + 148/28

x = (201 - 162 + 148)/28

x = 187/28

x = 6 19/28