Упростите выражение:
5/6(1/5n+6)-2/3(9-1/2n)+5/8(4/5n-8)

5/6(1/5+6)-2/3(9-1/2n)+5/8(4/5n-8)= 1/6+5/36-2/27+1/3n=11/36+7/27n(:3)=11/12+7/9n(:3)=11/4+7/3=33/12+28/12=61/12