Odpowiedź:
c)
[tex] \frac{12x}{ - 7} - \frac{30}{14} = - \frac{12x}{7} - \frac{15}{7} = - \frac{12x + 15}{7 } [/tex]
D)
[tex] \frac{8}{5 \times a} = \frac{2}{5} \\ 40 = 10a \\ 10a = 40 \\ a = 4[/tex]
12x * 14 = -7 * 30 /:14
12x = -1/2 * 30 /:12
x = -15 : 12 = -5/4 = -1 1/4
d)
5a * 2 = 8 * 5
10a =40 /:10
a = 4
Szczegółowe wyjaśnienie:
