Wednesday, December 7, 2011

Intermediate Algebra, Chapter 2, 2.7, Section 2.7, Problem 84

Evaluate the equation |13x|=|2x+1|.

This equation is satisfied either if 13x and 2x+1 are equal to each other or if 13x and 2x+1 are negatives of each other


13x=2x+1or13x=(2x+1)132x=1or13x+2x=111x=1or15x=1x=111orx=115


The solution set is {115,111}.

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