Bonsoir pourriez m'aider à fairez mon exos de maths svp
Exercice 60 p 81:Résoudre les équations suivants:
a)2x+1=x-3;
b)7x-8=9x+1.;
c)4-12x=-7-14x;
d)-3x+8=x-13;
e)2x+6=5x-3;
f)3x-8=-7x+1
Exercice 60 p 81:Résoudre les équations suivants:
a)2x+1=x-3;
b)7x-8=9x+1.;
c)4-12x=-7-14x;
d)-3x+8=x-13;
e)2x+6=5x-3;
f)3x-8=-7x+1
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x=-4
b)7x-8=9x+1.;
x=-4,5
c)4-12x=-7-14x;
x=-5,5
d)-3x+8=x-13;
x=5,25
e)2x+6=5x-3;
x=3
f)3x-8=-7x+1
x=0,9
a) 2x + 1 = x - 3
2x - x = - 3 - 1
x = -4
b) 7x - 8 = 9x + 1
- 8 - 1 = 9x - 7x
- 9 = 2x
x = - 9/2.
c) 4 - 12x = - 7 - 14x
- 12x + 14x = - 7 - 4
2x = - 11
x = -11/2
d) - 3x + 8 = x - 13
8 + 13 = x + 3x
21 = 4x
x = 21/4
e) 2x + 6 = 5x - 3
6 + 3 = 5x - 2x
9 = 3x
x = 3
f) 3x - 8 = - 7x + 1
3x + 7x = 1 + 8
10x = 9
x = 9/10
Bonne soirée :)