Question

Номера сверху не надо.

Answer 1

a)18(n-5)-5(3n+4)=18n-90-15n-20=3n-110

b)4/15(1(2/3)t-4,5k)-1,2(1/3t-0,5k)=4/15(5/3t-9/2k)-6/5(1/3t-1/2k)=2/15(10/3t-9k-3t+9/2t)=2/15(1/3t-9/2k)=2/45t-3/5k