Answer:
18
inches
Explanation:
Let's show this as an equation.
34 - 7
(2) = x
34 is the original sheet of brass, 2 is the amount of pieces Charlie cut the brass into, 7
is the width of the 2 pieces Charlie cut, and x is the width of the leftover brass.
7
=

34 -
(2) = x
34 -
= x
-
= x
= x
18
= x