Sagot :
Bonsoir,
a)
-23+2 = 9x-2x
-21 = 7x
x = -21/7
x= -3
b)
-5t+12t = 10-3
7t = 7
t = 7/7
t =1
c)
13-22 = 7x -4x
-9 = 3x
x= -9/3
x = -3
d)
-3a -1 = 2a +14
-1-14 = 2a +3a
-15 = 5a
a = -15/5
a = -3
a,b, d , ont la même solution
Réponse:
A)2x-23=9x-2
2x -9x = -2+ 23
- 7x=21
x = -7/21
la solution de est -7/21
B)3-5t=10-12t
5t +12t = 10-3
17t = 7
t= 17 / 7
La solution est 17/7