Given \qquad \overline{OA}\perp\overline{OC} OA ⊥ OC start overline, O, A, end overline, \perp, start overline, O, C, end overline \qquad m \angle AOB = 6x - 12^\circm∠AOB=6x−12 ∘ m, angle, A, O, B, equals, 6, x, minus, 12, degrees \qquad m \angle BOC = 3x + 30^\circm∠BOC=3x+30 ∘ m, angle, B, O, C, equals, 3, x, plus, 30, degrees Find m\angle AOBm∠AOBm, angle, A, O, B: