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ololo11 [35]
3 years ago
10

Tú tienes la mitad de lo que tenías y tendrás el triple de lo que tienes. Si tuvieras lo que tienes, tenías y tendrás, tendrías

lo que yo tengo que es 180 dólares más de lo que tú tendrás ¿Cuánto tenías? Ayuda por favor
Mathematics
1 answer:
Oxana [17]3 years ago
6 0

Answer:

Nosotros teníamos 120 dólares.

Step-by-step explanation:

Sean x, y, z lo teníamos, lo que tenemos y lo que tendremos, respectivamente. A continuación, traducimos puntos claves del enunciado en expresiones matemáticas:

(i) <em>Tu tienes la mitad de lo que tenías:</em>

y = \frac{1}{2}\cdot x (1)

(ii) <em>Tendrás el triple lo que tienes</em>:

z = 3\cdot y (2)

(iii) <em>Si tuvieras lo que tienes, tenías y tendrás, tendrías lo que yo tengo que es 180 dólares más de lo que tu tendrás</em>:

x+y+z = z + 180

x + y = 180 (3)

En consecuencia, tenemos el siguiente sistema de ecuaciones lineales:

\frac{1}{2}\cdot x -y = 0 (1)

3\cdot y - z = 0 (2)

x + y = 180 (3)

La solución del sistema de ecuaciones es: x = 120, y = 60, z = 180.

Nosotros teníamos 120 dólares.

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