Question

Read through the solution below. Then, answer

the questions that follow.
16
6 + d =
[box]*
d
ad=b(de-c)
b
=
ad
de
=e
-C
= b
In the line marked *, what strategy was used?
The expression
fills in the orange box.

Answer 1

D equals 10

Because 6 added to 10 is 16