Given the diagram of the right angle below, find the value for x. Enter a number only.
(12x-30)° (3x)°

Answer:
x= 8
Step-by-step explanation:
Sum of the two angles = 90
12x - 30 + 3x = 90
15x -30 = 90
15x = 90 + 30
15x = 120
x = 120/15 = 8