. 一盒中有人金屬 球和木製球共 20 個, 總重量為 76 kg。已知每
個金屬球和每個木製球的 重量分別為5kg 和3kg。
There are a total of20 metal balls and wooden balls in a box,
and the total weight ofthe balls is 76 kg. It is known that the
weights ofa metal ball and a Wooden ball are 5 kg and 3 kg
Tespectively,
(3) 設金中有乒個金屬球, 那麼木製球的數量是:
Tet there be metal balls in the box, then the number of
Wooden balls is:
(b) 由此,利用方程,求該會中的金屬球數量。
Hence, using, equation, find the number ofmetal balls in
the box.
改正 / Corrections
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