Sagot :
bjr
si 3 + x = 4
alors 3 - 3 + x = 4 - 3
x = 1
si x - 8 = 6
alors
x - 8 + 8 = 6 + 8
x = 14
si 2 * x = 8
alors 2/2 * x = 8 / 2
x = 4
si 5x + 2 = 17
alors 5x + 2 - 2 = 17 - 2
5x = 15
5x / 5 = 15/5
x = 3
vous avez toutes les étapes :)
Réponse:
1. 3+x=4
x=4-3
x=1
on a x-8=6
x=6+8
x= 14
2x=8
x=8/2=4
2 5x+2=17
5x=17-2
5x=15
x=15/5=1
-7x+4-2x=x-5
-7x-2x-x=-5-4
-9x-x=-9
-10x=-9
x=-9/-10=9/10
2x+4=4x+8-2x
2x-4x+2x=8-4
-2x+2x=4
0x=4
x=4
3x-9-6x=3-3x-12
3x-6x+3x=3-12+9
-3x+3x=-9+9
0x=0
x=0