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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 434.Ashirtcost434. A shirt cost 10 more than a tie. What is the cost of a tie?

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Solution

Vamos resolver o problema passo a passo.

  1. Vamos definir as variáveis:

    • Seja T T o custo de uma gravata.
    • Seja S S o custo de uma camisa.
  2. De acordo com o problema, sabemos que:

    • 3 gravatas e 5 camisas custam $434.
    • Uma camisa custa $10 a mais que uma gravata.
  3. Podemos escrever essas informações como equações:

    • 3T+5S=434 3T + 5S = 434
    • S=T+10 S = T + 10
  4. Substituímos a segunda equação na primeira:

    • 3T+5(T+10)=434 3T + 5(T + 10) = 434
  5. Simplificamos a equação:

    • 3T+5T+50=434 3T + 5T + 50 = 434
    • 8T+50=434 8T + 50 = 434
  6. Subtraímos 50 de ambos os lados da equação:

    • 8T=384 8T = 384
  7. Dividimos ambos os lados por 8:

    • T=48 T = 48

Portanto, o custo de uma gravata é $48.

This problem has been solved

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