Given \qquad m \angle LONm∠LONm, angle, L, O, N is a straight angle. \qquad m \angle LOM = 4x + 30^\circm∠LOM=4x+30 ∘ m, angle, L, O, M, equals, 4, x, plus, 30, degrees \qquad m \angle MON = 8x + 90^\circm∠MON=8x+90 ∘ m, angle, M, O, N, equals, 8, x, plus, 90, degrees Find m\angle MONm∠MONm, angle, M, O, N:
