生
5
茲班舉行聖誕聯眶會,其中茲位舉生
es昌 員人+
$20,最後一共收得 $218。若該班只有
有有多少位學生?
$6 而班主任則付
位班主任,問該班
Each Student in aclass pays $6 to buy food fora Christmas
party and the class teacher payS $20 Atotal sum Qf $218 is
colleeted. Ithere is only one class teacherin the class, how
many students are there in the class? 只
現時,父親比兒子大 27 戲。一年後,他們的歲數總和是 49
A father is 27 years older than the son. One year later, the sum
oftheir ageS will be 49.
(a) 若果兒子現時為x歲,那麼兒子
years old now, then the age ofthe son one
後的歲數是:
IFthe son is
year later 1S:
(b) 由此,利用方程,求父親和兒子 現時的歲數
Hence, using equation, find the present ages of the father
and the son,
P2.4
改正
Corrections