Sagot :
Bonjour,
Résoudre les équations suivantes en insérant des équations :
3x+7=-13-2x,
3x + 2x = - 13 - 7
5x = - 20
x = - 20/5
x = - 4
6x-3=3(x+6),
6x - 3 = 3x + 18
6x - 3x = 18 + 3
3x = 21
x = 21/3
x = 7
3(2x-3)=(5x+7)×(-3),
6x - 9 = - 15x - 21
6x + 15x = - 21 + 9
- 21x = - 12
x = 12/21
x = 4/7
1/4x= 3/2,
1/4x = 6/4
x = 6
3(3a-3)=a,
9a - 9 = a
9a - a = 9
8a = 9
a = 9/8
8-(3-2x)=3x,
8 - 3 + 2x = 3x
2x - 3x = - 8 + 3
- x = - 5
x = 5
2x+6=4x-28
2x - 4x = - 28 - 6
- 2x = - 34
x = 34/2
x = 17.