Please help!

True or false and if false, correct the underlined portion.
If 9>-3w-51>60 then *-3<w +17<20*
Note: these ** represent the underlined portion. I didn't know how else to do it.

if 9>-3w-51>60

add 51
60 > -3w > 111
divide by -3
-20 < w < -37

which of course is not possible,
since we can't have a number which is greater than -20 AND less than -37
(try to place such a number on a number line)