Sagot :
Réponse :
Explications étape par étape
Bjr,
3° ligne:
2-3x +6x-1 = 1+3x
6x-1 -4x-1 = 2x -2
-4x -1 +5 -3x = -7x +4
2° ligne:
1+3x+ 2x -2= 5x -1
2x -2 -7x +4= -5x +2
1° ligne
5x -1 + -5x +2= 1
☺
Explications étape par étape
( 2 - 3x ) + ( 6x - 1 ) = 2 - 3x + 6x - 1 = 1 + 3x
( 6x - 1 ) + ( - 4x - 1 ) = 6x - 1 - 4x - 1 = 2x - 2
( - 4x - 1 ) + ( 5 - 3x ) = - 4x - 1 + 5 - 3x = - 7x + 4
( 1 + 3x ) + ( 2x - 2 ) = 1 + 3x + 2x - 2 = - 1 + 5x
( 2x - 2 ) + ( - 7x + 4 ) = 2x - 2 - 7x + 4 = - 5x + 2
( - 1 + 5x ) + ( - 5x + 2 ) = 1
- 1 + 5x - 5x + 2 = 1
1 = 1