Определи, чему равен x, не вычисляя.
9 + x = 9;
x − 0 = 15;
9 : x = 1;
x : 12 = 0;
x * 9 = 9;
19 * x = 0;
9 − x = 0;
x + 17 = 17.
9 + x = 9
x = 0
9 + 0 = 9
x − 0 = 15
x = 15
15 − 0 = 15
9 : x = 1
x = 9
9 : 9 = 1
x : 12 = 0
x = 0
0 : 12 = 0
x * 9 = 9
x = 1
1 * 9 = 9
19 * x = 0
x = 0
19 * 0 = 0
9 − x = 0
x = 9
9 − 9 = 0
x + 17 = 17
x = 0
0 + 17 = 17