Odpowiedź :
Zad. 7
4 · x + 7 = 2 · x + 13 |- 2 · x
2 · x + 7 = 13 |- 7
2 · x = 6 |:2
x = 3 [K]
L = 4 · x + 7 = 4 · 3 + 7 = 12 + 7 = 19
P = 2 · x + 13 = 2 · 3 + 13 = 6 + 13 = 19
L = P
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3 · x + 6 = - 3 · x - 6 |+ 3 · x
6 · x + 6 = - 6 |- 6
6 · x = - 12 |: 6
x = - 2 [I]
L = 3 · x + 6 = 3 · (- 2) + 6 = - 6 + 6 = 0
P = - 3 · x - 6 = - 3 · (- 2) - 6 = 6 - 6 = 0
L = P
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7 · x + 4 = 4 · x + 4 |- 4 · x
3 · x + 4 = 4 |- 4
3 · x = 0 |: 3
x = 0 [Ń]
L = 7 · x + 4 = 7 · 0 + 4 = 0 + 4 = 4
P = 4 · x + 4 = 4 · 0 + 4 = 0 + 4 = 4
L = P
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- 7 · x + 8 = 2 - 4 · x |+ 4 · x
- 3 · x + 8 = 2 |- 8
- 3 · x = - 6 |:(- 3)
x = 2 [S]
L = - 7 · x + 8 = - 7 · 2 + 8 = - 14 + 8 = - 6
P = 2 - 4 · x = 2 - 4 · 2 = 2 - 8 = - 6
L = P
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- 2 · x + 7 = - 6 · x - 5 |+ 6 · x
4 · x + 7 = - 5 |- 7
4 · x = - 12 |: 4
x = - 3 [M]
L = - 2 · x + 7 = - 2 · (- 3) + 7 = 6 + 7 = 13
P = - 6 · x - 5 = - 6 · (- 3) - 5 = 18 - 5 = 13
L = P
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Tabela
| x | - 3 | - 2 | 0 | 2 | 3 |
| Litera | M | I | Ń | S | K |
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Hasło
Mińsk - stolica Białorusi.