AC Lim's answer to Elson's Secondary 1 Maths Singapore question.
done
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Total = 18
Math = y
Science = 18 -y
Cost
Math = y x $6 = 6y
Science = (18-y) × 10 = 180-10y
Total amount = 136
6y+180-10y = 136
4y = 44
y = 11
Math test books = 11
Hope this helps
Math = y
Science = 18 -y
Cost
Math = y x $6 = 6y
Science = (18-y) × 10 = 180-10y
Total amount = 136
6y+180-10y = 136
4y = 44
y = 11
Math test books = 11
Hope this helps
Date Posted:
4 years ago
Thx
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