Question

Решите уравнения:
1) 2 2/11 x - 5/16 = 1 3/4
2) 4 2/9 x + 3 5/14 = 6 11/21
3) 11/18 - 14/27 x = 5/12
4)1/3 x + 1/4 x + 1/5 x = 1 19/75
5)4 1/2 : x + 1 3/4 = 3 19/28
6) 3 2/3 : (x - 2 4/15) = 3 5/13

Answer 1

Ответ:

Х = 3/8;

4) 1/3x + 1/4x + 1/5x = 1 19/75;

0,3х + 0,25х + 0,2х = 94/75;

0,75х = 1,25;

Х = 1,25 ÷ 0,75;

Х = 1,67;

5) 4 1/2 : X +1 3/4 = 3 19/28;

9/2 ÷ х = 103/28 - 7/4;

4,5 ÷ х = 103/28 - 7/4 × 7/7;

4,5 ÷ х = 103/28 - 49/28;

4,5 ÷ х = 54/28;

4,5 ÷ х = 1,9;

Х = 4,5 ÷ 1,9;

Х = 2,37;

6) 3 2/3 : (X - 2 4/15) = 3 5/13;

11/3 ÷ (х - 34/15) = 44/13;

Х - 34/15 = 11/3 ÷ 44/13;

Х - 34/15 = 11/3 × 13/44;

Х - 34/15 = 13/12;

Х = 13/12 + 34/15;

Х = 1,08 + 2,26;

Х = 3,34.