Question

The sum of two angles 5x - 75 degree and 4 x + 66 degrees is 180 degree find the value of x

Answer 1

21.

Explanation:

5x - 75 + 4x + 66 = 180

5x + 4x = 180 + 75 - 66

9x = 180 + 9

9x = 189

x = 21.