This is because x is apart of a right angle which measures 90°. Therefore in order to find x we subtract the 32° which is also apart of the right angle from 90°. Hence we get 58° to be x.
Angles 32 and x form a right angle (meaning 90 degrees) so the equation set up would be 90-32=x. 90-32 equals 58 getting you an answer of 58 degrees. I hope this helps! :)
