Question

2) Resolva as seguintes proporções:
.
a) x 21
-- = ---
5 35

b) 10 50
--- = ---
7 x ​

Answer 1

$a) \frac{x}{5} = \frac{21}{35} \\ \\ \frac{x}{5} = \frac{3}{5} \\ \\ x = 3$

$b) \frac{10}{7} = \frac{50}{x} \\ \\ 10x = 350 \\ \\ x = 35$