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Réponse:
a. 5+ 6y=y+9
<=> 6y-y = 9-5
<=> 5y = 4
<=> y = 4/5
b.2+5x=7-3x
<=> 5x+3x = 7-2
<=> 8x = 5
<=> x = 5/8
Explications étape par étape:
a. 5 + 6y = y+9
5y+5=9
5y=4
y=4/5
b. 2+5x=7-3x
8x+2=7
8x=5
x=5/8
Réponse:
a. 5+ 6y=y+9
<=> 6y-y = 9-5
<=> 5y = 4
<=> y = 4/5
b.2+5x=7-3x
<=> 5x+3x = 7-2
<=> 8x = 5
<=> x = 5/8
Explications étape par étape:
a. 5 + 6y = y+9
5y+5=9
5y=4
y=4/5
b. 2+5x=7-3x
8x+2=7
8x=5
x=5/8