Réponse :
Explications étape par étape
Bonjour,
a)
2x+6 = 4x-4
6+4 = 4x -2x
10 = 2x
x= 10/2 = 5
b)
5-5x = 6x +3
5-3 = 6x +5x
2 = 11x
x= 2/11
c)
-x+2 = 4x +2
2-2 = 4x-x
S = 3x
x= 0
d)
3x+1 = 6 -3x
3x+3x = 6-1
6x = 5
x= 5/6
A)2(x+3)=4(x-1)
(2×x)+(2×3)=(4×x)-(4×1)
2x+6=4x-4
2x-4x=-4-6
-2x=-10
-2x/-2=-10/-2
X=5
B)5(1-x)=3(2x+1)
(5×1)-(5×x)=(3×2x)+(3×1)
5-5x=6x+3
-5x-6x=3-5
-11x=-2
-11x/-11=-2/-11
X=2/11
C)-(x-2)=2(2x+1)
-x+2=(2×2x)+(2×1)
-x+2=4x+2
-x-4x=2-2
-5x=2-2
X=5x=0
D)3x+1=3(2-x)
3x+1=(3×2)-(3×x)
3x+1=6-3x
3x+3x=6-1
6x=5
6x/6=5/6
X=5/6
