The length of the third side is x+5
Perimeter of a triangle
A triangle is a shape that has 3 sides and angles. Given the sides of the triangles 2x+4 and 3x -1
Perimeter of triangle = s1 + s2 + s3
Given the following
Perimeter = 6x + 8
s1 = 2x + 4
s2 = 3x - 1
Substitute
6x+8 = 2x+4+3x-1+s3
6x+8 = 5x+3+s3
s3 = 6x-5x+8-3
s3 = x + 5
Hence the length of the third side is x+5
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