[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:00.00,0:00:03.16,Default,,0000,0000,0000,,문제: a의 값을 구한 뒤 검산하여라
Dialogue: 0,0:00:03.16,0:00:06.37,Default,,0000,0000,0000,,a + 5= 54 이므로
Dialogue: 0,0:00:06.37,0:00:10.67,Default,,0000,0000,0000,,미지수 a에
Dialogue: 0,0:00:10.67,0:00:14.02,Default,,0000,0000,0000,,5를 더하면 54가 된다는 뜻이군요
Dialogue: 0,0:00:14.02,0:00:17.81,Default,,0000,0000,0000,,암산할 수 있지만 체계적으로 풀어보겠습니다
Dialogue: 0,0:00:17.81,0:00:21.21,Default,,0000,0000,0000,,그래야 복잡한 문제를 풀 때에도 도움이 되니까요
Dialogue: 0,0:00:21.21,0:00:25.38,Default,,0000,0000,0000,,일반적으로 방정식을 풀 때에는
Dialogue: 0,0:00:25.38,0:00:27.47,Default,,0000,0000,0000,,구하고자 하는 변수만
Dialogue: 0,0:00:27.47,0:00:29.76,Default,,0000,0000,0000,,한 쪽변에 남깁니다
Dialogue: 0,0:00:29.76,0:00:31.61,Default,,0000,0000,0000,,a만 남겨야 합니다
Dialogue: 0,0:00:31.61,0:00:35.39,Default,,0000,0000,0000,,a가 좌변에 있으므로 a만 남기고 모두 없애주겠습니다
Dialogue: 0,0:00:35.39,0:00:38.26,Default,,0000,0000,0000,,더하기 5를 없애야겠군요
Dialogue: 0,0:00:38.26,0:00:45.21,Default,,0000,0000,0000,,더하기 5를 없애려면 5를 빼야합니다
Dialogue: 0,0:00:45.22,0:00:50.02,Default,,0000,0000,0000,,a + 5 = 54에서 5를 빼보겠습니다
Dialogue: 0,0:00:50.02,0:00:57.20,Default,,0000,0000,0000,,등식이 성립할려면\N양변에 똑같이 빼줘야합니다
Dialogue: 0,0:00:57.20,0:01:00.62,Default,,0000,0000,0000,,따라서 우변에서도 5를 빼줍니다
Dialogue: 0,0:01:00.62,0:01:03.12,Default,,0000,0000,0000,,a+5 -5 = a+0
Dialogue: 0,0:01:03.12,0:01:05.04,Default,,0000,0000,0000,,a+5 -5 = a+0
Dialogue: 0,0:01:05.04,0:01:06.97,Default,,0000,0000,0000,,5 - 5를 해서
Dialogue: 0,0:01:06.97,0:01:08.11,Default,,0000,0000,0000,,5가 소거되기 때문입니다
Dialogue: 0,0:01:08.11,0:01:10.35,Default,,0000,0000,0000,,a + 0 = a입니다
Dialogue: 0,0:01:10.35,0:01:15.25,Default,,0000,0000,0000,,그리고 54 - 5 = 49이지요
Dialogue: 0,0:01:15.25,0:01:19.02,Default,,0000,0000,0000,,a의 값이 49라는 것을 알았습니다
Dialogue: 0,0:01:19.02,0:01:27.11,Default,,0000,0000,0000,,이제 원래 식에 49를 대입하여 검산하겠습니다
Dialogue: 0,0:01:27.11,0:01:32.40,Default,,0000,0000,0000,,49 + 5 = 54가 맞는지 확인해볼까요?
Dialogue: 0,0:01:32.40,0:01:34.14,Default,,0000,0000,0000,,대입만 했습니다
Dialogue: 0,0:01:34.14,0:01:41.64,Default,,0000,0000,0000,,49 + 5 = 54
Dialogue: 0,0:01:41.64,0:01:43.38,Default,,0000,0000,0000,,49 + 5 = 54
Dialogue: 0,0:01:43.38,0:01:45.03,Default,,0000,0000,0000,,확인해보면
Dialogue: 0,0:01:45.03,0:01:50.89,Default,,0000,0000,0000,,49 + 5 =54가 맞군요!
Dialogue: 0,0:01:50.89,0:01:53.95,Default,,0000,0000,0000,,모든 확인이 끝났습니다