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Sagot :

2(y-7)-(3y+11)=5-(2y-5)

2y-14-3y-11=10-2y

4y-3y=10+11+14
y=35

Donc 2y-14-3y-11=5-2y+5

-y-14=10-2y

-14-10=-2y+y

-24=-y

y=24

Voila :)

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