Question

calculati termenul necunoscut al proportiei.a}x/7=15/21
b}30=15/x.

va rog frumos

Answer 1

$\frac{x}{7} = \frac{15}{21} = > \frac{x}{7} = \frac{5}{7} = > x = \frac{7 \times 5}{7} = \frac{35}{7} = 5 \\ \\ \frac{30}{1} = \frac{15}{x} = > x = \frac{1 \times 15}{30} = \frac{1}{2} = 0.5$

$Succese!$