Question

a) 30/(x + 1, 2) = 7/(0, 7)
дам 10б.​

Answer 1

Ответ:

$\frac{30}{x + 1.2} = \frac{7}{0.7} \\ 30 \times 0.7 = 7x + 8.4 \\ 21 - 8.4 = 7x \\ x = 1.8$