[tex]\frac{x=5\\}{y}[/tex]Réponse :
1)
3x - 5 = 2x + 10
3x - 2x = 10 + 5
x = 15
2)
4( x - 1 ) = 1 - ( x + 2 ) + 7
4x - 4 = 1 - x - 2 + 7
4x - 4 = -x + 6
4x + x = 10
5x = 10
x = 10/5
x = 2
3)
(4x - 5) / 2 = (3x - 1) / 3
(4x - 5) * 3 = (3x - 1) * 2
12x - 15 = 6x - 2
12x - 6x = -2 + 15
6x = 13
x = 13 / 6
VOILAA :)
Explications étape par étape
