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À̱â·Á¸é ÁöÇý¸¦ Å°¿ö¶ó!(96ȸ)

µî·Ï LV47alexÇÒ¹è Á¶È¸ 346 Ãßõ 0 µî·ÏÀÏ 2023-05-26 ¿ÀÀü 8:51:46
[¸ð¹ÙÀÏ ¹öÀüÀ¸·Î º¸±â]

À̱â·Á¸é ÁöÇý¸¦ Å°¿ö¶ó!(96ȸ)

...

<Á¦ 096 ȸ> : jeanÀº ¸î »ìÀΰ¡?

 

[¹®] :

Á¶¿î(joan)°ú ÀçÀÎ(jane)Àº ÀڸŵéÀÌ´Ù.

 

jeanÀº joanÀÇ µþÀÌ°í ±×³àÀÇ À̸𺸴٠12»ìÀÌ ¾î¸®´Ù.

joanÀº ÁöÀÎ(jean)ÀÇ µÎ ¹èÀÇ ³ªÀÌ´Ù.

 

4³â Àü¿£,

joanÀº Áö±ÝÀÇ janeÀÇ ³ªÀÌ¿Í °°¾Ò°í,

janeÀº ±×³àÀÇ Á¶Ä« º¸´Ù µÎ ¹è¿´´Ù.

 

jeanÀº ¸î »ìÀΰ¡?

 

º¸±â :

°¡) 12 ³ª) 14 ´Ù) 16 ¶ó) 18

 

[´ä] ( )

==

[q] :

joan and jane are sisters.

jean is joans daughter and 12 years younger than her aunt.

joan is twice as old as jean.

 

four years ago,

joan was the same age as jane is now,

and jane was twice as old as her niece.

 

how old is jean?

==

<Áß¿ä ´Ü¾î>

aunt /©¡nt/[¾Ö^¾ÈÆ®]

n. ¾ÆÁÖ¸Ó´Ï(À̸ð, ¹é¸ð, ¼÷¸ð, °í¸ð) [opp.] uncle, ¾ÆÁܸ¶(³ªÀÌ Áö±ßÇÑ ºÎÀο¡ ´ëÇÑ ¾ÖĪ).

 

niece /ni:s/[´ÏÀ̽º]

n. Á¶Ä«µþ, Áú³à. [cf.] nephew.

 

[Á¤´ä ¹× Çؼ³]

Á¤´ä : ´Ù) 16

Çؼ³ :

joan = x, jane = y jean = z --·Î ÇÏÀÚ.

(1) z = y - 12

(2) x = 2z

(3) x -4 = y

(4) y -4 = 2(z-4)

ÀÌ°ÍÀ» Ç®¾îº¸¸é,

so joan is 32, jane is 28, and jean is 16.

==


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