Question

como faz essa conta?​

Answer 1

$\frac{x}{8} = \frac{15}{5} \\ 5x = 120 \\ x = \frac{120}{5} \\ x = 24 \\ \\ \frac{7}{2} = \frac{x}{10} \\ 2x = 70 \\ x = \frac{70}{2} \\ x = 35$