Sagot :
Bonjour,
a) 9x-3=4x+8
9x-4x= 8+3
5x = 11
x= 11/5
b) -5x-1=3x+11
-1-11 = 3x+5x
-12 = 8x
x= -12/8 = -6/4 = -3/2
c) 3-2(2x-1)=5x-3(2x+4)
3-4x +2 = 5x -6x +12
3+2 -12 = 5x-6x +4x
-7 = 3x
x= -7/3
Réponse:
A) -864
B) +165
C) -840
explication:
faut que tu face 9x-3= -27.
4x+8= 32
-27× 32= -864