Объяснение:
№ 1) 16n-24-9+n<3-n</strong>
17n-33<3-n</strong>
17n+n<3+33</strong>
18n<36</strong>
n<2</strong>
№ 2) 4k-3-20k^2+15k-10k+20k^2>1-3k
9k-3>1-3k
9k+3k>1+3
12k>4
k>1\3 или k>0,3
№ 3) (2-3t)*(2+3t)-12t+9t^2>9-7t
4-9t^2-12t+9t^2>9-7t
4-12t>9-7t
-12t+7t>9-4
-5t>5
t>-1