Equal meaning...

If meaning

If x²=y³ , for what value of z does x^3z=y⁹

If x²y³=10 and x³y²=8 , what is the value of x⁵y⁵

The discount price of a book is 20% less than the retail price. James manages to purchase the book at 30% off the discount price at a special book sale. What percent of the retail price did James pay?

To prepare for class, Mr.Chu has to print a number of booklets with p pages per booklet. If every 5 pages cost c cents to print and he spent a total of d dollars , how many booklets did Mr.Chu print in terms of p, c , and d ?