Erica has 4 fewer CDs than Kim. Write this situation as an algebraic expression
First we have to give names to the quantities that each lady has.
Number of CDs that Erica has = E
Number of CDs that Kim has = K
The algebraic expression (actually an equation):
E = K - 4
\(E\ \rightarrow\ the\ number\ CDs\ of\ Erica\\\\K\ \rightarrow\ the\ number\ CDs\ of\ Kim\\\\E=K-4\)