Montraie is going to a carnival that has games and rides. Each game costs $1 and each ride costs $3.75. Montraie spent $17.50 altogether on 12 games and rides. Determine the number of games Montraie played and the number of rides Montraie went on.
Question
Montraie is going to a carnival that has games and rides. Each game costs 3.75. Montraie spent $17.50 altogether on 12 games and rides. Determine the number of games Montraie played and the number of rides Montraie went on.
Solution
Vamos resolver o problema passo a passo.
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Definimos as variáveis:
- representa o número de jogos que Montraie jogou.
- representa o número de passeios que Montraie fez.
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Escrevemos as equações baseadas nas informações fornecidas:
- Cada jogo custa $1, então o custo total dos jogos é .
- Cada passeio custa $3.75, então o custo total dos passeios é .
- Montraie gastou $17.50 no total, então a primeira equação é:
- Montraie participou de 12 jogos e passeios no total, então a segunda equação é:
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Resolvemos o sistema de equações:
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Primeiramente, isolamos na segunda equação:
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Substituímos na primeira equação:
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Simplificamos a equação:
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Isolamos :
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Encontramos substituindo na segunda equação:
Portanto, Montraie jogou 10 jogos e fez 2 passeios.
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