Номер 50

x + 3 = 11;
x = 11 – 3;
x = 8;
8 + 3 = 11;
11 = 11.

x + 7 = 19;
x = 19 – 7;
x = 12;
12 + 7 = 19;
19 = 19.

x – 8 = 5;
x = 5 + 8;
x = 13;
13 – 8 = 5;
5 = 5.

x – 9 = 4;
x = 4 + 9;
x = 13;
13 – 9 = 4;
4 = 4.

60 – x = 59;
x = 60 – 59;
x = 1;
60 – 1 = 59;
59 = 59.

12 – x = 12;
x = 12 – 12;
x = 0;
12 – 0 = 12;
12 = 12.


Коментарі

Всього коментарів: 0