Question

What’s |4n-15| = |n|

Answer 1

n = 3, 5.

Explanation:

|4n-15| = |n|

Square both sides:

16n^2 - 120n + 225 = n^2

15n^2 - 120n + 225 = 0

Divide through by 15:

n^2 - 8n + 15 =

(n - 3)(n - 5) = 0

n = 3, 5.