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Difference between two numbers is 5, six times of the smaller lacks by 6 from the four times of the greater. Find the numbers ?Options13 & 8 12 & 715 & 1014 & 9

Question

Difference between two numbers is 5, six times of the smaller lacks by 6 from the four times of the greater. Find the numbers ?Options13 & 8 12 & 715 & 1014 & 9

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Solution

Vamos resolver o problema passo a passo.

  1. Vamos chamar os dois números de x x e y y , onde x x é o maior número e y y é o menor número.

  2. De acordo com a primeira condição, a diferença entre os dois números é 5: xy=5 x - y = 5

  3. De acordo com a segunda condição, seis vezes o menor número é 6 unidades a menos que quatro vezes o maior número: 6y=4x6 6y = 4x - 6

Agora, vamos resolver essas equações simultaneamente.

Primeiro, isolamos x x na primeira equação: x=y+5 x = y + 5

Substituímos x x na segunda equação: 6y=4(y+5)6 6y = 4(y + 5) - 6

Expandimos e simplificamos: 6y=4y+206 6y = 4y + 20 - 6 6y=4y+14 6y = 4y + 14

Subtraímos 4y 4y de ambos os lados: 2y=14 2y = 14

Dividimos ambos os lados por 2: y=7 y = 7

Agora, substituímos y y na equação x=y+5 x = y + 5 : x=7+5 x = 7 + 5 x=12 x = 12

Portanto, os números são 12 e 7.

A opção correta é: 12 & 7

This problem has been solved

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