Question

Qual o valor de X na expressão a seguir:
X = 1/2 - [8/7 (1/3 + 3/5) - (7/4 : 3/2)]

Answer 1

$X=\frac{1}{2}-\left[\frac{8}{7}(\frac{1}{3}+\frac{3}{5})-(\frac{7}{4} \div \frac{3}{2})\right]\\ \\ X=\frac{1}{2}-\left[\frac{8}{7}(\frac{14}{15})-(\frac{7}{4} * \frac{2}{3})\right]\\ \\ X=\frac{1}{2}-\left[\frac{16}{15}-\frac{7}{6}\right]\\ \\ X=\frac{1}{2}-\frac{16}{15}+\frac{7}{6}\\ \\ X=\frac{83}{30}$