What is the equation for determining the angle measures?

(1 point)
( )° + 4x° = °
if (7x-9)°+4x

The equation for determining the angle measures is:

(7x-9)° + 4x° = °

WHATS THE ANSWER!!!!!!!!!!

The answer depends on what you want to solve for. Please provide more information or specify which variable you would like to solve for in order to get a specific answer.

is 90