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4-21.

Solve for in each equation below.

  1. Rewrite both sides of the equation so they have the same base. Now the exponents must be equal. Write an equation and solve for .

  1. Follow the steps in part (a). Notice that both and can be rewritten as powers of .

  1. Follow the steps in part (a).

  1. Get all the terms on one side of the equation, factor, and use the Zero Product Property.