Bonjour,
-2y +4y = -3-5
2y = -8
y = -8/2 = -4
-3x -7 = -2x +1
-7 +1 = -2x +3x
-6 = x
x = -6
4x+9 = 7-3x
4x+3x = 7 -9
7x = -2
x= -2/7
-3 -(4x-2) =5
-3 -4x +2 = 5
-3+2 -5 = 4x
-6 = 4x
x = -6/4
x= - 3/2
2/3 -3x = 1/3
2/3 -1/3 = 3x
1/3 = 3x
x= 1/(3*3)
x = 1/9
x/4 = 3/10
x= (3*4)/10
x= 12/10
x= 6/5 = 1,2
-5 -2x/3 = -1/2
-5 +1/2 = 2x/3
-25/10 + 5/10 = 2x/3
-20/10 = 2x/3
2x/3 = -2
2x = 2*3= 6
x= 6/2 = 3
Réponse :
Salut ,
-3X-7=-2X+1
-3X+2X=1+7
-X=8
on voit pas 4X+9= ??
-3-(4X-2)=5
-1-4X=5
-4X=6
X=-3/2
2/3-3X=1/2
-3X=-1/6
X=1/18
X/4=3/10
10X=12
X=6/5
-5-2/3X=-3/2
-30-4X=-9
-4X=-9+30
-4X=21
X=-4/21
J'espère avoir pu t'aider !
Bon courage !
Explications étape par étape :
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Bonjour,
-2y +4y = -3-5
2y = -8
y = -8/2 = -4
-3x -7 = -2x +1
-7 +1 = -2x +3x
-6 = x
x = -6
4x+9 = 7-3x
4x+3x = 7 -9
7x = -2
x= -2/7
-3 -(4x-2) =5
-3 -4x +2 = 5
-3+2 -5 = 4x
-6 = 4x
x = -6/4
x= - 3/2
2/3 -3x = 1/3
2/3 -1/3 = 3x
1/3 = 3x
x= 1/(3*3)
x = 1/9
x/4 = 3/10
x= (3*4)/10
x= 12/10
x= 6/5 = 1,2
-5 -2x/3 = -1/2
-5 +1/2 = 2x/3
-25/10 + 5/10 = 2x/3
-20/10 = 2x/3
2x/3 = -2
2x = 2*3= 6
x= 6/2 = 3
Réponse :
Salut ,
-3X-7=-2X+1
-3X+2X=1+7
-X=8
on voit pas 4X+9= ??
-3-(4X-2)=5
-1-4X=5
-4X=6
X=-3/2
2/3-3X=1/2
-3X=-1/6
X=1/18
X/4=3/10
10X=12
X=6/5
-5-2/3X=-3/2
-30-4X=-9
-4X=-9+30
-4X=21
X=-4/21
J'espère avoir pu t'aider !
Bon courage !
Explications étape par étape :