a)x+2<14
x<14-2
x<12
x€(-infinit,12)
b)2r+5<sau egal 17
2r<sau egal 17-5
2x<sau egal 12
x<sau egal 6
x€(-infinit,6]
c)(21+17)+2(x-5)<42
38+2x-10<42
28+2x<42
2x<42-28
2x<14
x<7
x€(-infinit,7)
a)2<sau egal x-3<sau egal5
x-3 sau egal >2
x-3<sau egal 5
x€[5,8]
b)5<2x+5<sau egal 11
2x+5>5
2x+5< sau egal 11
x€(0,3]
c)5-x> sau egal 3
-x> sau egal 3-5
-x> sau egal -2
x<sau egal 2
x€(-infinit,2]