f) x+ 1 = 1 4 2 i) 2(x-5)=3(-x+2) k) - 2 (x+3)- 1 = 3 x - 1 3 2 4 2 m) x-(5-3x)=3x+4 l) -3x = 7 2 2
Mathématiques
gabriellafaletu
Question
f) x+1 =1
4 2
i) 2(x-5)=3(-x+2)
k) -2 (x+3)- 1 = 3 x - 1
3 2 4 2
m) x-(5-3x)=3x+4
l) -3x = 7
2 2
4 2
i) 2(x-5)=3(-x+2)
k) -2 (x+3)- 1 = 3 x - 1
3 2 4 2
m) x-(5-3x)=3x+4
l) -3x = 7
2 2
1 Réponse
-
1. Réponse maudmarine
f) x+1 =1
4 2
4x/4 = - 1/4 + 2/4
4x/4 = 1/4
4x = 1
x = 1/4
i) 2(x-5)=3(-x+2)
2x - 10 = - 3x + 6
2x + 3x = 6 + 10
5x = 16
x = 16/5
k) -2 (x+3)- 1 = 3 x - 1
3 2 4
2-2/3x - 6/3 - 1/2 = 3/4x - 1/2
-2/3x - 3/4x = 6/3 + 1/2 - 1/2
-8/12x - 9/12x = 24/12
- 17x - 4x = 24
- 17x = 24
x = - 24/17
m) x-(5-3x)=3x+4x
x - 5 + 3x = 3x + 4
x + 3x - 3x = 5 + 4
x = 9
l) -3x = 7
2 2
- 3x = 7
x = - 7/3