On Father's Day, Miko wanted to buy a shirt and a tie for her father. 3 ties and 5 shirts cost $434. A shirt cost $10 more than a tie. What is the cost of a tie?
Question
On Father's Day, Miko wanted to buy a shirt and a tie for her father. 3 ties and 5 shirts cost 10 more than a tie. What is the cost of a tie?
Solution
Vamos resolver o problema passo a passo.
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Vamos definir as variáveis:
- Seja o custo de uma gravata.
- Seja o custo de uma camisa.
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De acordo com o problema, sabemos que:
- 3 gravatas e 5 camisas custam $434.
- Uma camisa custa $10 a mais que uma gravata.
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Podemos escrever essas informações como equações:
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Substituímos a segunda equação na primeira:
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Simplificamos a equação:
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Subtraímos 50 de ambos os lados da equação:
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Dividimos ambos os lados por 8:
Portanto, o custo de uma gravata é $48.
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