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A jewelry store sold 40 rings for a total of $2,680. If a gold ring costs $80 and a silver ring costs $60, how many silver rings were sold?​
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A jewelry store sold 40 rings for a total of $2,680. If a gold ring costs $80 and a silver ring costs $60, how many silver rings were sold?​

User Kacper Wolkowski
by
7.7k points

1 Answer

3 votes
Let g = gold and s = silver

g + s = 40
80g + 60s = 2680

g = 40 - s
80(40 - s) + 60s = 2680

3200 - 80s + 60s = 2680
3200 - 20s = 2680
-20s = -520
s = 16

16 silver rings were sold
User Jay Tillu
by
8.0k points
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