2/5m+3/5m-2/15=1/6 z-8/15z=1/3 5/9x=1 1/3(одна целая одна 3-я)

1) 2/5m + 3/5m - 2/15 = 1/6;

(2 + 3)/5m = 1/6 + 2/15;

5/5m = 1/6 + 2/15;

1m = 1/6 + 2/15;

m = (1 * 5)/(6 * 5) + (2 * 2)/(15 * 2);

m = 5/30 + 4/30;

m = (5 + 4)/30;

m = 9/30;

m = (3 * 3)/(3 * 10);

m = 3/10.

Ответ: m = 3/10.

2) z - 8/15z = 1/3;

15/15z - 8/15z = 1/3;

(15 - 8)/15z = 1/3;

7/15z = 1/3;

z = 1/3 : 7/15;

z = 1/3 * 15/7;

z = (3 * 5)/(3 * 7);

z = 5/7.

Ответ: z = 5/7.

3) 5/9x = 1 1/3;

x = 1 1/3 : 5/9;

x = (1 * 3 + 1)/3 : 5/9;

x = (3 + 1)/3 : 5/9;

x = 4/3 * 9/5;

x = (4 * 3 * 3)/(3 * 5) 

x = 12/5;

x = 2 2/5.

Ответ: х = 2 2/5.