Question

(1)x=11 pe 10- [2 1 pe 3-(1 pe 2 la puterea a doua)] :5 pe 2 (2) 11 pe 10 +x=15 pe 8 aflați pe X.

Answer 1

$x = \frac{11}{10} - ( \frac{21}{3} - ( \frac{1}{2} ) {}^{2} ) \div \frac{5}{2} \\ \\ x = \frac{11}{10} - (7 - \frac{1}{4} ) \times \frac{2}{5} \\ \\ x = \frac{11}{10} - \frac{28 - 1}{4} \times \frac{2}{5} \\ \\ x = \frac{11}{10} - \frac{27}{4} \times \frac{2}{5} \\ \\ x = \frac{11}{10} - \frac{27}{10} \\ \\ x = - \frac{8}{5}$

$\frac{11}{10} + x = \frac{15}{8} \\ \\ x = \frac{15}{8} - \frac{11}{10} \\ \\ x = \frac{75 - 44}{40} \\ \\ x = \frac{31}{40}$