Answer:
1. x = 12
2. x = 18
Step-by-step explanation:
1. Angle ABD + angle CBD = 180 degrees
(4x+6) + (11x-6) = 180
4x + 6 + 11x - 6 = 180
4x + 11x = 180
15x = 180
x = 12
2. 2x + 3x = 90
5x = 90
x = 18
