Bonjour,
1)
x= 3+5
x= 8
2)
x= 12-8
x= 4
3)
x= 20/4
x= 5
4)
x = -14/2
x = -7
24 -8x +4x -8 = 11
-8x+4x = 11 -24 +8
-4x = -5
x= 5/4
3x +12 = -32 +4x
12+32 = 4x -3x
44 =x
6-9x -4-5x = 0
6 -4 = 9x +5x
2 = 14x
x= 2/14 = 1/7
Réponse:
1) x-5=3
x=3+5
x=8
2) x+8=12
x=12-8
x=4
3) 4x=20
x=-20/4
4) -2x=14
x=-14/2
1) 8(3-x)+4x-8=11
24-8x+4x-8-11=0
-4x+5=0
-4x=-5
x=5/4
2) 3(x+4)=4(-8+x)
3x+12=-32+4x
3x+12+32-4x=0
-x+44=0
-x=-44
x=44
3) 3(2-3x)-(4+5x)=0
6-9x-4-5x=0
-14x+2=0
-14x=-2
x=2/14
