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Sagot :

VINS

bonjour

stylo = x

cahier = x + 0.3

copies = 2 ( x + 0.3 ) = 2 x + 0.6

Montant des achats = 3 x + 5 ( x + 0.3) + 2 ( 2 x + 0.6)

= 3 x + 5 x + 1.5 + 4 x + 1.2

= 12 x + 2.7

si x = 1.4

montant = 12 * 1.4 + 2.7 = 19.50 €

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