Sagot :
bonjour
a. x /2.5 - 2/3 = 0
x /2.5 = 2/3
3 x = 5
x = 5 /3
b. 2 ( x + 7) - 2 x = 14
2 x + 14 - 2 x = 14
0 x = 14 - 14
0 x = 0
c. 3 ( 2 x - 5 ) - 6 x = 2
6 x - 15 - 6 x = 2
0 x = 2 + 15
0 x = 17 donc pas de solution
Bonjour
a x/2,5 - 2/3 = 0
3x/7,5 - 5/7,5 = 0
3x = 5
x = 5/3.
b. 2 (x + 7) - 2x = 14
2x + 14 - 2x = 14
2x - 2x = 14 - 14
0x = 0 → Equation indéterminée qui admet des solutions infinies dans l'ensemble des nombres réels.
c. 3 (2x - 5) - 6x = 2
6x - 15 - 6x = 2
6x - 6x = 2 + 15
0x = 17 → Impossible.