Respuesta:
2x - 0.5x = 30
x = 20
Explicación paso a paso:
Llamemos "x" a la incógnita, el número desconocido.
Cuando nos referimos al doble de un número, es lo mismo que 2x.
Cuando nos referimos a la mitad de un número, es lo mismo que 0.5 x.
Consideremos que al doble de un número (2x) se le resta su mitad 0.5x) y se obtiene 30. La ecuación resultante es:
2x - 0.5x = 30
1.5x = 30
x = 30/1.5 = 20
Answer:
3, 5, 2, 1, 4
Step-by-step explanation:
In step 2, parentheses are eliminated: distributive property.
In step 3, x is subtracted: subtraction property.
In step 4, 12 is added: addition property.
In step 5, the equation is divided by 17: division property.
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The properties are listed in the order of statements ...
3, 5, 2, 1, 4
Answer:
0.85 Euros have the same amount as 1 U.S dollar.
Step-by-step explanation:
Given : The equation ![E= \frac{17}{20}D](https://tex.z-dn.net/?f=E%3D%20%5Cfrac%7B17%7D%7B20%7DD)
To find : Number of Euros which has same value as D U.S. dollar ?
Solution :
The equation ![E= \frac{17}{20}D](https://tex.z-dn.net/?f=E%3D%20%5Cfrac%7B17%7D%7B20%7DD)
Where, E= amount of Euros
D= amount of U.S dollar.
Now for 1 U.S dollar we put D=1,
![E= \frac{17}{20}(1)](https://tex.z-dn.net/?f=E%3D%20%5Cfrac%7B17%7D%7B20%7D%281%29)
![E= \frac{17}{20}](https://tex.z-dn.net/?f=E%3D%20%5Cfrac%7B17%7D%7B20%7D)
Therefore, 0.85 Euros have the same amount as 1 U.S dollar.