Solution: Let total articles be $ x $. $ 0.6x = 45 $. Divide: $ x = \frac450.6 = 75 $. \boxed75Question: If $\fraca + ba - b + \fraca - ba + b = 3$, find the value of $\fraca^2 + b^2a^2 - b^2$. - go-checkin.com