Find the length of the longest side of the triangle if the perimeter is 23.

12 units

Step-by-step explanation:

We are told that the perimeter of this triangle is 23 units. Since the perimeter of a triangle is the sum of its three sides, we right this sum using for each side the expression that they show in the picture.

Perimeter =

Therefore, the value of the unknown "x" which appears in the expressions for all of the three sides, is 3 units.

Then, the side: 3x-5 = 3(3)-5 = 9-5 = 4 units

the side 2x+1 = 2(3)+1 = 6+1 = 7 units

and the side 4x = 4(3) = 12 units (therefore this is the longest side).

3 is greater then both of those numbers

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step-by-step explanation: