two families go ice skating one day. the first family spends $25 for 5 kids and 2 adults. the second family spend $14 for 3 kids and 1 adult. how much does a skate rental cost f
Respuestas
The rental value of the skates is
$ 5 Value adults
$ 3 Value children
Step by step explanation:
To solve this problem we must formulate two equations with two unknowns and then resilient the system of 2 * 2 equations by any method.
The first family spends $ 25 for 5 children and 2 adults
5n + 2a = 25
The second family spends $ 14 for 3 children and 1 adult
3n + 1a = 14
n = (14 - 1a) / 3
Substitution Method, Substitute in Equation 1
5 (14 - 1a) / 3 + 2a = 25
70/3 + a / 3 = 25
70 + a = 75
a = $ 5 Value adults
n = (14 - 5) / 3
n = $ 3 Children value
Espanish
El valor de alquiler de los patines es de
$5 Valor adultos
$3 Valor niños
Explicación paso a paso:
Para resolver este problema debemos formular dos ecuaciones con dos incognitas para luego resilver el sistema de ecuaciones de 2*2 por cualquier metodo.
La primera familia gasta $ 25 por 5 niños y 2 adultos
5n + 2a = 25
La segunda familia gasta $ 14 por 3 niños y 1 adulto
3n + 1a = 14
n = (14 - 1a)/3
Metodo de sustituicion , Sustituimos en ecuacion 1
5(14 - 1a)/3 + 2a = 25
70/3 +a/3 = 25
70 + a = 75
a = $5 Valor adultos
n = (14 - 5)/3
n = $3 Valor niños