대답: # m = 9 # 설명: # 7m + 4m = 11m # # 11m = 99 # # m = 9 # 대답: # m = 9 # 설명: #m (7 + 4) = 99 # # 11m = 99 // -: 11 # # (11m) / 11 = 99 / 11 # # (color (red) cancel11m) / color (red) cancel11 = 9 # # m = 9 #