Question 493817
we know angles ABD and angles CBD = angle ABC = 60.
x^2 -7x +2x  = 60
x^2 -5x - 60 = 0
(x + 5)(x - 12) = 0
Therefore, x = 12.
12*12 = 144 - 108 = 36 degrees
2(12) = 24 degrees
24 + 36 = 60 degrees.
Cleomenius.