Question

3/4(1,6-1 2/3а)-4 1/2(1,8-2/9а)

Answer 1

$\frac{3}{4} (1.6 - 1 \frac{2}{3} a) - 4 \frac{1}{2} (1.8 - \frac{2}{9}a) = \frac{3}{4} \times ( \frac{8}{5} - \frac{5}{3} a) - \frac{9}{2} \times ( \frac{9}{5} - \frac{2}{9} a) = \frac{3}{4} \times ( \frac{8}{5} - \frac{5}{3} a - 6( \frac{9}{5} - \frac{2}{9} a)) = \frac{3}{4} \times ( \frac{8}{5} - \frac{5}{3} a - \frac{54}{5} + \frac{4}{3} a) = \frac{3}{4} \times ( \frac{46}{5} - \frac{1}{3} a) = \frac{3}{4} \times \frac{1}{15} \times ( - 138 - 5a) = \frac{1}{4} \times \frac{1}{5} \times ( - 138 - 5a) = \frac{1}{20} \times ( - 138 - 5a)$