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Barbara40465
@Barbara40465
April 2019
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Quelqu'un pourrais m'aider pour cet exercice sur les équations ?
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winner123
Verified answer
Bonsoir
3x -y = 11
x - 5y = 57
- y = 11 - 3x
x - 5(11 -3 x ) = 57
x - 55 + 15x = 57
14x = 57 + 55
14x = 112
x = 8
24 - y = 11
- y = 11 -24
- y = - 13
y = 13
On vérifie
x - 5y = 57
8 - 65 = 57
57 = 57
0 votes
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Verified answer
Bonsoir3x -y = 11
x - 5y = 57
- y = 11 - 3x
x - 5(11 -3 x ) = 57
x - 55 + 15x = 57
14x = 57 + 55
14x = 112
x = 8
24 - y = 11
- y = 11 -24
- y = - 13
y = 13
On vérifie
x - 5y = 57
8 - 65 = 57
57 = 57