Bonjour
Résoudre les équations suivantes :
a. 7x-11=3x+15
7x - 3x = 15 + 11
4x = 26
x = 26/4
x = 13/2
b. 4(x-3) +5=7x-12
4x - 12 + 5 = 7x - 12
4x - 7x = - 12 + 12 - 5
- 2x = - 5
x = 5/2
c. 5x-5-(2x+1) =2x-14
5x - 5 - 2x - 1 = 2x - 14
5x - 2x - 2x = - 14 + 5 + 1
x = - 8
d. 4x/7=3/14
8x = 3
x = 3/8
e. 7(x-2) -3x=2x-14
7x - 14 - 3x = 2x - 14
7x - 3x - 2x = - 14 + 14
2x = 0
x = 0
f. 3x-5=(4x+3) -(x-7)
3x - 5 = 4x + 3 - x + 7
3x - 4x + x = 3 + 7 + 5
0x = équation impossible.
