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The price of one bag of granola is $2.
An equation is an expression that is used to show the relationship between two or more variables and numbers.
Let x represent the number of sport drink, y for banana drink and z for granola drink, hence:
x + y + 2z = 7.5 (1)
Also:
2x + 2y + 2z = 11 (2)
And:
x + 3z = 8.5 (3)
Hence:
x = 2.5, y = 1 and z = 2
The price of one bag of granola is $2.
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