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miss Akunina [59]
3 years ago
14

Si compro 7 cuadernos y 3 lapiceros  gasto $ 44 Pero si compro 7 lapiceros y 3 cuadernos gasto $ 36 ¿Cuánto cuesta 1 lapicero y

1 cuaderno?
Mathematics
2 answers:
saul85 [17]3 years ago
8 0
Sea x el numero de cuadernos & y el numero des lapiceros:

Entonces traducir el Español al lenguaje de matamaticas: 

7x+3y=44
3x + 7y =36

Y encontrarás x=$5 & y=$3

MissTica3 years ago
5 0
Un cuaderno = $5

Un lapicero = $3

7 cuadernos × $5 = $35
3 lapiceros × $3 = $9
$35+$9=$44

7 lapiceros × $3 = $21
3 cuadernos × $5 = $15
$21+$15=$36
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