Question

El costo total de 5 libros de texto y 4 lapiceros es de $32; el costo de otros 6 libros de texto igual y 3 lapiceros es de $33, Halla el costo de cada artículo

Answer 1

Respuesta:

Libros=a

Lapiceros=b

1) 5a+4b=32

a=(32-4b)/5

2)6a+3b=33

a=(33-3b)/6

Igualamos ambas ecuaciones

(32-4b)/5=(33-3b/6

6(32-4b)=5(33-3b)

192-24b=165-15b

192-165=24b-15b

27=9b

27/9=b

3=b

Reemplazamos el valor de b en la 1 ecuación

a=(32-4b)/5

a=(32-4(3))/5

a=(32-12)/5

a=20/5

a= 4

Libros = $4

Lapiceros= $3

Explicación paso a paso:

Answer 2

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