Question

Выражение: 1)5/6(1/5n+6)-2/3(9-1/2n)+5/8(4/5n-8)=

Answer 1

$\frac{5}{6} ( \frac{1}{5} n+6)- \frac{2}{3} (9- \frac{1}{2} n)+ \frac{5}{8} ( \frac{4}{5} n-8)= \frac{1}{6} n+5-6+ \frac{1}{3} n+ \frac{1}{2} n-5=$$= \frac{1}{6} n-6+ \frac{2}{6} n+ \frac{3}{6} n= \frac{6}{6}n-6=n-6$