ÁöÇý Ű¿ì´Â ¿µ¾î(Á¦ 93 ȸ) : ¼ºÀÎÇ¥¿Í ÇлýÇ¥´Â ¾ó¸¶³ª ÆÈ·È³ª?
english that cultivates wisdom !
¹® :
¾î¶² ¿µÈ°üÀº ¼ºÀΠƼÄÏÀ» 12´Þ·¯¿¡, Çлý ƼÄÏÀ» 8´Þ·¯¿¡ ÆÇ¸ÅÇÑ´Ù.
a movie theater sells adult tickets for $12 and student tickets for $8.
¾î´À ³¯, ÀÌ ¿µÈ°üÀº 150ÀåÀÇ Æ¼ÄÏÀ» ÆÇ¸ÅÇÏ¿© 1,560´Þ·¯ÀÇ ¼öÀÔÀ» ¿Ã·È´Ù.
on a certain day, the theater sold 150 tickets and collected $1,560.
¼ºÀÎÇ¥¿Í ÇлýÇ¥´Â °¢°¡ ¸î À徿 ÆÇ¸Å µÇ¾ú´Â°¡?
how many adult tickets and student tickets were sold?
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´ä : ¼ºÀÎÇ¥ ( ) ÇлýÇ¥( )
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[Á¤´ä ¹× ÇØ¼³]
Á¤´ä : ¼ºÀÎÇ¥ : 90, ÇлýÇ¥: 60
ÇØ¼³ :
Âü°í : ¼ºÀÎÇ¥ = $12 ÇлýÇ¥ = $8 ÃÑÆÇ¸Å = 150 Àå ÃѼöÀÔ = $1,560
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step 1: º¯¼ö ¼³Á¤
x = ¼ºÀÎÇ¥¼ö y = ÇлýÇ¥¼ö
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step 2: ½Ä ¼¼¿ì±â
total tickets : x+y=150
total money: 12x+8y=1560
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step 3: ¿¬¸³¹æÁ¤½Ä Ç®ÀÌ
x+y=150 ¢¡ y=150−x
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12x+8(150−x)=1560
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12x+1200−8x= 1560
--
4x+1200=1560 4x + 1200 = 1560
4x+1200=1560 4x=360 x=90 90x=90
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step 4: y ±¸Çϱâ
y=150−90=60 60y=150−90=60
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Á¤¸® :
¼ºÀÎÇ¥ : 90, ÇлýÇ¥: 60
==