bonjour
x+3=-8
x = - 8 - 3
x = - 11
10y=25
y = 25/10 = 2.5
y-7=2
y = 2 + 7 = 9
4x=20
x = 20/4 = 5
2x+8=20
2 x = 20 - 8
2 x = 12
x = 6
5x+8=3x+20
5 x - 3 x = 20 - 8
2 x = 12
x = 6
20x+3=15x+18
20 x - 15 x = 18 - 3
5 x = 15
x = 3
4x-5=2x-13
4 x - 2 x = - 13 + 5
2 x = - 8
x = - 4
-2x-3=2x+13
- 2 x - 2 x = 13 + 3
- 4 x = 16
x = - 4
11x+4=x+23
11 x - x = 23 - 4
10 x = 19
x = 1.9
5(2x-1)=8x+15
10 x - 5 = 8 x + 15
10 x - 8 x = 15 + 5
2 x = 20
x = 10
3(4x+2)=14x+7
12 x + 6 = 14 x + 7
12 x - 14 x = 7 - 6
- 2 x = 1
x = - 1 /2
