Question

Решите неравенство:1)3-2(u-1)>8+u;2)5(u+2)+14<6-u;3)0.25(3+8u)>6.25+u

Answer 1

1) 3-2u+2 > 8+u
-2u-u > 8-3-2
-3u > 3
u<-1

2) 5u+10+14 < 6-u
5u+u < 6-10-14
6u < -18
u < -3

3) 0.75+2u > 6.25+u
2u-u > 6.25-0.75
u > 5.5