Mr Ho bought a television set for his parents with 50% of his salary. He saved 60% of the remaining money in bank and had $150 left. How much did Mr Ho have at first?
Question
Mr Ho bought a television set for his parents with 50% of his salary. He saved 60% of the remaining money in bank and had $150 left. How much did Mr Ho have at first?
Solution
Vamos a resolver el problema paso a paso.
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Denotemos el salario inicial de Mr. Ho como .
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Mr. Ho gastó el 50% de su salario en un televisor. Entonces, la cantidad gastada en el televisor es:
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El dinero restante después de comprar el televisor es:
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Mr. Ho ahorró el 60% del dinero restante en el banco. Entonces, la cantidad ahorrada es:
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Después de ahorrar, el dinero que le queda es:
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Sabemos que el dinero que le queda es $150. Por lo tanto, podemos escribir la ecuación:
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Para encontrar el salario inicial , resolvemos la ecuación:
Por lo tanto, Mr. Ho tenía inicialmente $750.
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