*"<_" is less than equal to*
5) -15<x-8<-4
6)12<_4n<28
7)-2<_3b+7<_13
2 answers
for "less than or equal to" use the left carat key "<" along with the "alt option" key to get "≤".
just solve both sides at once.
-15<x-8<-4
add 8 everywhere:
-15+8 < x-8+8 < -4+8
-7 < x < 4
what do you get for the others?
-15<x-8<-4
add 8 everywhere:
-15+8 < x-8+8 < -4+8
-7 < x < 4
what do you get for the others?