Question

ciete x entre trece =90

Answer 1

$\frac{7x}{13} = 90 \\ 7x = 90 \times 13 \\ x = \frac{1170}{7} =167.1428571429 \\ \\ verifiquemos \: sustituyendo \: x \\ \frac{7(167.1428571429)}{13} = 90 \\ \frac{1170}{13} = 90 \\ 90 = 90$