Question

Find X if three angles of a triangle are 31°,39° and (11x+11°)​

Answer 1

Answer:

9

Step-by-step explanation:

Sum of 3 angles of a triangle is 180

The 3 angles are: 31, 39 and 11x + 11

31 + 39 + 11x + 11 = 180

11x + 81 = 180

11x = 180 - 81

11x = 99

x = 99/11

x = 9