Odpowiedź:
d)
7 • x - 8 = 22
7x - 8 = 22
7x = 22 + 8
7x = 30 /: 7
x = 4 i 2/7
Cześć!
[tex]7 \cdot \: x - 8 = 22 \\ 7x = 22 + 8 \\ 7x = 30 \\ x = \frac{30}{7} [/tex]