There are 3 more girls than boys in Tom's class, and the sum of girls and the boys is 41. How many boys and girls are there each?
(1) If the number of boys is X, the number of girls is ( X + ( ) ) .
[Sol] X + [ X + ( ) ] = 41
(2) If the number of girls is X, the number of boys if [ ( ) ].
[Sol] X + [ ( ) ] = 41
請幫忙 謝謝
這題數點計呢
2007-08-14 8:56 pm
回答 (1)
2007-08-14 9:00 pm
✔ 最佳答案
(1) If the number of boys is X, the number of girls is ( X + (3 ) ) .[Sol] X + [ X + (3 ) ] = 41
2X+3=41
2X=38
X=19
(2) If the number of girls is X, the number of boys if [ (X-3 ) ].
[Sol] X + [ ( X-3) ] = 41
2X-3=41
2X=44
X=22
2007-08-14 13:48:00 補充：
19boys 22girls
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