Sagot :
[tex]bonjour\\\\\\3 x - 5 = 3 + 2 x \\3 x - 2 x = 3 + 5 \\x = 8 \\\\\\2 - x = x + 5 \\- x - x = 5 - 2 \\- 2 x = 3 \\x = - 3 /2 \\\\\\6 x + 7 = x - 13\\6 x - x = - 13 - 7 \\5 x = - 20 \\x = - 4 \\\\1 - x = - 2 x + 4 \\- x + 2 x = 4 - 1 \\x = 3 \\\\[/tex]
Réponse:
3x-5=3+2x
3x-2x=3+5
x=8
2-x=x+5
-x-x=5-2
-2x=3
x=-3/2
6x+7=x-3
6x-x=-3-7
5x=-10
x=-10/5
x=-2
1-x= -2x+4
-x+2x=4-1
x=3