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Sagot :
Answer:
Step-by-step explanation:
No se si esto deberia ser mas dificil pero aqui voy:
Pregunta 1.
27 - 15 = 12
El numero es 12
Pregunta 2.
27 - 5= 22 dividido 2 = 11
El numero que pensastes es 11
Pregunta 3.
32 - 8 = 24 dividido 2 = 12
El tiene 12 años
Use el metedo reversa.
Construyendo y resolviendo las ecuaciones, encontramos que:
- 1. El numero es 12.
- 2. El numero es 11.
- 3. La edad de Juan es 12.
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Ejercicio 1
- El número es x.
- Sumando 15, tenemos x + 15
- Obtuve 27, entonces:
[tex]x + 15 = 27[/tex]
[tex]x = 27 - 15 = 12[/tex]
- El numero es 12.
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Ejercicio 2
- El número es x.
- Multiplicando por 2, tenemos 2x.
- Sumando 5, tenemos 2x + 5.
- Obtuve 27, entonces:
[tex]2x + 5 = 27[/tex]
[tex]2x = 22[/tex]
[tex]x = \frac{22}{2}[/tex]
[tex]x = 11[/tex]
- El numero es 11.
---------------
Ejercicio 3
- La edad es x.
- Doble de la edad es 2x.
- Sumando 8, tenemos 2x + 8.
- Obtuve 32, entonces:
[tex]2x + 8 = 32[/tex]
[tex]2x = 24[/tex]
[tex]x = \frac{24}{2}[/tex]
[tex]x = 12[/tex]
- La edad de Juan es 12.
Se da una pregunta similar en https://brainly.com/question/19560278
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