Verified Answer :

An equilateral triangle has all the sides equal.
So we are given with x + 12, 2x - 5 and 3x - 22 inches.
Which means :
x + 12 = 2x - 5 = 3x - 22
Solving for x : 
x + 12 = 2 x - 5
12 + 5 = 2 x - x
17 = x

Answer:

29 inches

Step-by-step explanation:


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