Question

Find x if the perimeter is 23.
2x+1
3x-5
4x

Answer 1

perimeter is the length of all sides added up so we add the expressions

(2x + 1) + (3x - 5) + (4x) = 9x-4

9x - 4 = 23

now work backwards

add 4 to 23 to get rid of -4

9x = 27

now divide by 9 to get x

x = 3