An equilateral triangle has a perimeter of #6x+15#. What is the length of each side of the triangle?

1 Answer
Rui D.
Jan 21, 2016

#2x+5#

Explanation:

The perimeter of a triangle is
#P_triangle=s1+s2+s3#

If the triangle is equilateral, #s1=s2=s3=side# and
#P_triangle=3*side# => #side=P_triangle/3#

Since #P_triangle=6x+15#
=> #side=(6x+15)/3# => #side=2x+5#

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