Seven times the number of quarters in a coin collection is the same as three times the number of quarters increased by 20. How many quarters in the collection
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Ответ:
5
Explanation:
Let P be the number of quarters in a coin collection.
Seven times the number of quarters in a coin collection is expressed as;
7×P
= 7P... (1)
Also three times the number of quarters can be expressed as 3P. If this value is increased by 20, the resulting expression will be;
3P+20 (increment means addition)...(2)
If the two expression are the same then equation 1 = equation 2 i.e
7P = 3P + 20
7P-3P = 20
4P = 20
P = 20/4
P = 5
Therefore the number of quarters in the coin collection is 5
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