Bonjour Pouvez vous me corriger merci : 5-(x-3)=4x-(3x-8) 5-x+3=4x-3x+8 -x-4x+3x=8-5-3 -5x+3x=0 -2x=0 X=0 4x+3-(x+1)+5=5x+7 4x+3-x-1+5=5x+7 4x-x-5x=7-3+1-5 -2x=
Mathématiques
Titan5239
Question
Bonjour
Pouvez vous me corriger merci :
5-(x-3)=4x-(3x-8)
5-x+3=4x-3x+8
-x-4x+3x=8-5-3
-5x+3x=0
-2x=0
X=0
4x+3-(x+1)+5=5x+7
4x+3-x-1+5=5x+7
4x-x-5x=7-3+1-5
-2x=0
X=0
-1/2x+3=x-7
-1/2x-x=-7-3
-1/2x-2x/2=-10
-3/2x=-10
X=-10/-3/2
X=10*2/3
X= 20/3
7x-1/4=5/11
7x=5/11+1/4
7x=20/44+11/44
7x= 31/44
X= 31/44/7
X=31/44*1/7
X=31/308
X-1/4-5=2x-3/2+3/4
X-1/4-(2x-3/2)=3/4+5
X-1/4-2x+3/2=3/4+20/4
X-1-4x+6/4=23/4
-3x+5/4=23/4
Je suis coincée comment sortir le x ?
2x+3/6-x-1/6=x+2/3+2
2x+3/6-x+1/6-x+2/3+2
2x+3-x+1-2x+4/6=2
-x+8/6=2
-x=2/8/6
X=-2*6/8
X=-3/2
3-2x/5-x-2/10=5x+2/2-1/5
6-4x/10-x-2/10-25x+10/10=1/5
-30x+14/10=-1/5
-30x/10+14/10=1/5
-30x/10=-1/8-14/10
-30x=/10=-2/10-14/10
-3x=-16/10
X=-16/10/3
X=-16/10*1/3
X=-16/30
X=-8/15
Merci par avance
Pouvez vous me corriger merci :
5-(x-3)=4x-(3x-8)
5-x+3=4x-3x+8
-x-4x+3x=8-5-3
-5x+3x=0
-2x=0
X=0
4x+3-(x+1)+5=5x+7
4x+3-x-1+5=5x+7
4x-x-5x=7-3+1-5
-2x=0
X=0
-1/2x+3=x-7
-1/2x-x=-7-3
-1/2x-2x/2=-10
-3/2x=-10
X=-10/-3/2
X=10*2/3
X= 20/3
7x-1/4=5/11
7x=5/11+1/4
7x=20/44+11/44
7x= 31/44
X= 31/44/7
X=31/44*1/7
X=31/308
X-1/4-5=2x-3/2+3/4
X-1/4-(2x-3/2)=3/4+5
X-1/4-2x+3/2=3/4+20/4
X-1-4x+6/4=23/4
-3x+5/4=23/4
Je suis coincée comment sortir le x ?
2x+3/6-x-1/6=x+2/3+2
2x+3/6-x+1/6-x+2/3+2
2x+3-x+1-2x+4/6=2
-x+8/6=2
-x=2/8/6
X=-2*6/8
X=-3/2
3-2x/5-x-2/10=5x+2/2-1/5
6-4x/10-x-2/10-25x+10/10=1/5
-30x+14/10=-1/5
-30x/10+14/10=1/5
-30x/10=-1/8-14/10
-30x=/10=-2/10-14/10
-3x=-16/10
X=-16/10/3
X=-16/10*1/3
X=-16/30
X=-8/15
Merci par avance
1 Réponse
-
1. Réponse maudmarine
Bonsoir,
5-(x-3)=4x-(3x-8)
5 - x + 3 = 4x - 3x + 8
- x - 4x + 3x = 8 - 5 - 3
- 2x = 0
x = 0 - Ok
4x+3-(x+1)+5=5x+7
4x + 3 - x - 1 + 5 = 5x + 7
4x - x - 5x = 7 - 3 + 1 - 5
- 2x = 0
x = 0 - Ok
-1/2x+3=x-7
- 1/2x - x = - 7 - 3
- 1/2x - 2/2x = - 10
- 3/2x = - 10
- 3/2x = - 20/2
- 3x = - 20
x = 20/3 - Ok
7x-1/4=5/11
7x = 5/11 + 1/4
7x = 20/44 + 11/44
7x = 31/44
308/44x = 31/44
308x = 31
x = 31/308 - Ok
X-1/4-5=2x-3/2+3/4
x - 2x = - 3/2 + 3/4 + 1/4 + 5
- x = - 6/4 + 3/4 + 1/4 + 20/4
- x = 18/4
x = - 18/4
2x+3/6-x-1/6=x+2/3+2
2x - x - x = 2/3 + 2 - 3/6 + 1/6
0x --> Impossible
3-2x/5-x-2/10=5x+2/2-1/5
- 2x/5- x - 5x = 2/2 - 1/5 - 3 + 2/10
- 2x/5 - 5/5x - 25/5x = 1 - 3 + 1/5
- 32/5x = - 2 + 1/5
- 32/5x = - 10/5 + 1/5
- 32/5x = - 9/5
- 32x = - 9
x = 9/32