Answer:
x=15.1°
Step-by-step explanation:
Angles in an equilateral triangle adds up to 180°
(4x - 10) + (3x - 22) + (3x + 3) = 180
Putting the like terms together;
4x + 3x + 3x - 10 - 22 + 3 = 180
10x - 29 = 180
10x = 180 - 29 = 151
x = 151/10 = 15.1°