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Sagot :

LOLA3334

je mets le résultat direct

1) x = - 3

2) je sais pas

3) n = 3

4) a = - 3

SARARIOLO

Réponse:

4(x+2)=x-1

4x+8=x-1

4x-x=-1-8

3x=-9

x=-9/3

X=-3

3n-1=2(n+1)

3n=2n+2+1

3n-2n=3

1n=3

n=3

5y+1=3(y-1)-2

5y=3y-3-2-1

5y-3y=-6

2y=-6

Y=-6/2

-3

4(a+1)-5=6a+5

4a+4-5=6a+5

4a-6a=5-4+5

-2a=6

a=6/-2

a=-3

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