Read through the solution below. Then, answer the questions that follow.
a /b + c /d = e
a /b = e − c /d
a b = [box]


























⇒ω∫∑↓ω⇆π∑⇔⊥,∫d *
ad = b(de − c) ad de − c = b In the line marked *, what strategy was used? The expression fills in the orange box.





i give up