Sagot :
bonjour
4 x + 20 = 10 x + 3
4 x - 10 x = 3 - 20
- 6 x = - 17
x = 17/6
3 x - 6 = 6 x + 24
3 x- 6 x = 24 + 6
- 3 x = 30
x = - 10
7 x - 5 x - 3 = 5 x - 15 - 2
2 x - 5 x = - 17 + 3
- 3 x = - 14
x = 14/3
7 n + 14 - 3 = 25 - 3 n - 4
7 n + 3 n = 25 - 4 - 14 + 3
10 n = 10
n = 1
4 y + 12 y - 6 = 3 y + 3
16 y - 3 y = 3 + 6
13 y = 9
y = 9 /13
Bonjour,
Résoudre les équations:
a. 4(x+5)=10 x+3
4x+20-10x= 3
-6x= 3-20
x= -17/-6
x= 17/6
b. 3(x-2)=6(x+4)
3x-6= 6x+24
3x-6x= 24+6
-3x= 30
x= -30/3
x= -10
c.7x-(5x+3)=5(x-3)-2
7x-5x-3= 5x-15-2
2x-5x= -17+3
-3x= -14
x= -14/-3
x= 14/3
d. 7(n+2)-3=25-(3n+4)
7n+14-3= 25-3n-4
7n+3n= 21-11
10n= 10
n= 10/10
n= 1
e.4y+3(4y-2)=3(y+1)
4y+12y-6= 3y+3
16y-3y= 3+6
13y= 9
y= 9/13