Answer:
30°
Step-by-step explanation:
We have a right angle and two other angles equal to 7x and 2x. The sum of all of the angles is 360, so therefore 7x + 2x = 360 - 90 = 270°
9x = 270°
We divide both sides by nine and get that
9x/9 = 270/9
x = 30°
