Question

Упростите 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$