Two-fifths of one less than a number is less than three-fifths of one more than that number. What numbers are in the solution set of this problem?

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Answer:

Numbers in the solution set of this problem = ( -5, ∞)

Step-by-step explanation:

Let the number be x.

Two-fifths of one less than a number \(=\frac{2}{5}(x-1)\)

Three-fifths of one more than a number \(=\frac{3}{5}(x+1)\)

We have two-fifths of one less than a number is less than three-fifths of one more than that number

That is

             \(\frac{2}{5}(x-1)<\frac{3}{5}(x+1)\\\\\frac{2}{5}x-\frac{2}{5}<\frac{3}{5}x+\frac{3}{5}\\\\\frac{x}{5}+1>0\\\\x>-5\)

Numbers in the solution set of this problem = ( -5, ∞)