Odpowiedź :
Odpowiedź:
[69 * x + (100 - x) * 71] : 100 = 69,72
[69x + 7100 - 71x] : 100 = 69,72
(7100 - 2x) : 100 = 69,72 | * 100
7100 - 2x = 6972
- 2x = 6972 - 7100
- 2x = - 128
2x = 128
x = 128 : 2 = 64
Odpowiedź:
[69 * x + (100 - x) * 71] : 100 = 69,72
[69x + 7100 - 71x] : 100 = 69,72
(7100 - 2x) : 100 = 69,72 | * 100
7100 - 2x = 6972
- 2x = 6972 - 7100
- 2x = - 128
2x = 128
x = 128 : 2 = 64