Question

Lines AN and CT are perpendicular. If m angle AFT = 3x + 21 and m angle CFN = y + 45, which is the value of x + y?

Answer 1

I somehow came up with 69. What am I doing wrong? Or is it right>

Answer 2

i got 68, they are all right angles which means y+45 = 90, y=45
3x+21=90, x=23
45 +23 = 68