Answer:
The width of the prism is 2x - 1.
Hope this helps!
Explanation:
( there is no addition or subtraction sign between
and
)
The volume of a rectangular prism is Length*Width*Higth.
( 2x - 1 )*( x + 2 ) =

=

Which is the equation, so the width of the prism is 2x - 1.