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valeryozoria0551
@valeryozoria0551
January 2024
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Aide s'il te plaît c'est pour demain
Exercice 1 1) Soit l'équation x - 1 = 2x + 1 a) 3 est-il solution de l'équation ? b) -2 est-il solution de l'équation ? 2) Résoudre les équations suivantes : a) -11x - 8 = 0 b) 1 - 3x = 14x c) 9 + 6x = 11x - 15 d) 4(2x - 1) = 10x + 6 e) 16x +22=14x-5 3
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lea4128
Exercice 1:
1)
C’est -2 la solution puisque :
x-1=2x+1
x-2x= 1+1
-x= 2
-x/-1= 2/-1
x=-2
2)
a)
-11x-8=0
-11x= 8
-11x/-11=8/-11
x=8/-11
b)
1-3x=14x
-3x-14x= -1
-17x= -1
-17x/-17=-1/-17
x=1/17
c)
9+6x=11x-15
6x-11x=-15-9
-5x=-24
-5x/-5=-24/-5
x= 24/5=4,8
d)
4(2x-1)=10x+6
8x-4=10x+6
8x-10x=6+4
-2x=10
-2x/-2= 10/-2
x=-5
e)
16x+22=14x-5
16x-14x=-5-22
2x=-27
2x/2=-27/2
x=-13,5
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1)
C’est -2 la solution puisque :
x-1=2x+1
x-2x= 1+1
-x= 2
-x/-1= 2/-1
x=-2
2)
a)
-11x-8=0
-11x= 8
-11x/-11=8/-11
x=8/-11
b)
1-3x=14x
-3x-14x= -1
-17x= -1
-17x/-17=-1/-17
x=1/17
c)
9+6x=11x-15
6x-11x=-15-9
-5x=-24
-5x/-5=-24/-5
x= 24/5=4,8
d)
4(2x-1)=10x+6
8x-4=10x+6
8x-10x=6+4
-2x=10
-2x/-2= 10/-2
x=-5
e)
16x+22=14x-5
16x-14x=-5-22
2x=-27
2x/2=-27/2
x=-13,5