Question

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

A. 3 units
B. 4 units
C. 12 units
D. 18 units ​

Answer 1

A, 3 units. Plug in each number where x is and see which sums up to 23. Hope this helped :) !

Answer 2

12

Explanation:

Add up the given side lengths : 4x + 3x - 5 + 2x + 1 = 9x - 4 and this is equal to 23

9x - 4 = 23 ➡ 9x = 27 ➡ x = 3

The side lengths will be 12, 7, and 4

The longest one would be 12 if we replace x with the value we found.