Hi

If the three sides of a triangle are x, x+5, and 2x+5.

For what values "x" would the triangle have a perimeter of at least 72?

Question states***

  x + x+5 + 2x+5 ≥ 72

Solving for x

     4x ≥ 62

      x ≥ 15.5

CHECKING our Answer***

 15.5 + 20.5 + 36 = 72 

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