Question

urgente!!!!!!!!
me ajudem​

Answer 1

Resposta:

a)

$\frac{2}{5} = \frac{x}{4 } \: \: \: \: \: 5x = 18 \\ \: \: \: \: \: \: \: x = \frac{8}{5 \: } = 1.6$

b)

$\frac{2x - 1}{3x + 4} = \frac{3}{6 } \\ 12x - 6 = 9x + 12 \\ 3x = 18 \: \: x = \frac{18}{3} = 6$