Question

07) Na figura abaixo, all bllc. Qual o valor de x+y?
A)9
B)13
C) 18
D) 21
E) 25​

Answer 1

$\frac{18}{x} = \frac{15}{5} \\ 15 \times x = 18 \times 5 \\ 15x = 90 \\ x = \frac{90}{15} \\ x = 6$

$\frac{6}{y} = \frac{5}{10} \\ 5 \times y = 6 \times 10 \\ 5y = 60 \\ y = \frac{60}{5} \\ y = 12$

x+y=?

6+12=18

Letra c)