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beverlady
@beverlady
January 2021
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salut vous pouvez m'aider pour un exercice de maths ?
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trudelmichel
Verified answer
Bonjour,
soit x mon age
mon pére a
x+30
dans 3 ans j'aurai
x+3
mon pére aura
x+30+3=x+33
et
x+33=3(x+3)
x+33=3x+9
33-9=3x-x
24=2x
12=x
j'ai 12 ans et mon pére a 12+30=42
Vérification
12+3=15
42+3=45
45=3x15
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Lista de comentários
Verified answer
Bonjour,soit x mon age
mon pére a
x+30
dans 3 ans j'aurai
x+3
mon pére aura
x+30+3=x+33
et
x+33=3(x+3)
x+33=3x+9
33-9=3x-x
24=2x
12=x
j'ai 12 ans et mon pére a 12+30=42
Vérification
12+3=15
42+3=45
45=3x15