TRAVAIL FACILE : résoudre les équations suivantes : .3x+12=0
.4x-12=6
.-5x+10= -5
. 3x+2,4=7,5
.10-4x=0
.8-3x=5
.4x-12=6
.-5x+10= -5
. 3x+2,4=7,5
.10-4x=0
.8-3x=5
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3x = - 12
x = - 12/3
x = - 4
4x - 12 = 6
4x = 6 + 12
4x = 18
x = 18/4
x = 9/2
- 5x + 10 = - 5
- 5x = - 5 - 10
- 5x = - 15
x = - 15/-5
x = 3
3x + 2,4 = 7,5
3x = 7,5 - 2,4
3x = 5,1
x = 5,1/3
x = 1,7
10 - 4x = 0
10 = 4x
10/4 = x
5/2 = x
8 - 3x = 5
8 - 5 = 3x
3 = 3x
3/3 = x
1 = x
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