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Sagot :

Bonjour,

1° cadeau: x

2° cadeau: x+15

3° cadeau: 2(x+15)= 2x+30

a)

x+ (x+15) +2( x+15) =125

x+x+15 +2x+30  =125

4x= 125 - 15 -30  

4x =80

x= 80/4

x= 20

1° cadeau: 20€

2° cadeau : 20+15 => 35€

3° cadeau : 35*2=> 70€

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