Question

0.05 Encontre o valor de xe y no caso a seguir
€
E
15
10
B
А
D
18​

Answer 1

Resposta:

$\frac{15}{(y + 18)} = \frac{10}{18} \\ 10y + 180 = 270 \\ 10y = 270 - 180 \\10 y = 90 \\ y = \frac{90}{10} \\ y = 9$

$9 + 18 = 27 \\ \frac{(10 + x)}{27} = \frac{x}{18} \\ 180 + 18x = 27x \\ 180 = 27x - 18x \\ 9x = 180 \\ x = \frac{180}{9} \\ x = 20$