how long is the shorter song?

Question

Amanda composed two songs. The longer song is 126 seconds less than twice the length of the short song. The longer song is 286 seconds. How long is the shorter song?

Answer 1

LongSong = 286s

LongSong = 2 * ShortSong - 126s

 

=>

2 * ShortSong - 126s = 286s

2 * ShortSong = 286s + 126s

2 * ShortSong = 412s

ShortSong = 206s