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verom70
@verom70
January 2021
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réponse trouvée mais je n arrive pas à expliquer aux exercices merci
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trudelmichel
Verified answer
Bonjour, T=teeshirt P=pantalon
5T+1P=70
5T+2P=90
(5t+2p)-(5t+1p)=90-70
5T-5T+2P-1P=20
P=20
si P=20
alors 5T+20=70
5T=70-20
5T=50
T=10
si 7 cahiers coutent 5€
alors 42 cahiers coutent
42=6*7
5*6=30
moins la réduction
30-8=22
a+b+c=50
si a+b=26
alors
26+c=50
c=24
alors
si b+c=38
b+24=38
b=38-24
b=14
si a+b=26
alors
a+14=26
a=26-14
a=12
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Thanks 1
verom70
merci beaucoup
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Verified answer
Bonjour, T=teeshirt P=pantalon5T+1P=70
5T+2P=90
(5t+2p)-(5t+1p)=90-70
5T-5T+2P-1P=20
P=20
si P=20
alors 5T+20=70
5T=70-20
5T=50
T=10
si 7 cahiers coutent 5€
alors 42 cahiers coutent
42=6*7
5*6=30
moins la réduction
30-8=22
a+b+c=50
si a+b=26
alors
26+c=50
c=24
alors
si b+c=38
b+24=38
b=38-24
b=14
si a+b=26
alors
a+14=26
a=26-14
a=12