Question

A) 2x/10 = 7/4

B)13/24 = 9/×

Answer 1

$a) \\ \frac{2x}{12} = \frac{7}{4 } \\ 8x = 84 \\ x = \frac{84}{8} \\ x = 10,5 \\ b) \\ \frac{13}{24} = \frac{9}{x} \\ 13x = 216 \\ x \frac{216}{13} \\ x = 16.61$
Espero ter ajudado,
Bons estudos!