bonjour, pouvez vous m'aider a faire cets questions
Bonjour,
a)
x² -x² -x -10x = -7 -3
-11x = -10
x= -10/-11 = 10/11
b)
x = (25/16 )/(5/4) = (25*4) / (16 *5) = 5/4
c)
4x+6x/7 = 5 -1/2
28x/7 + 6x/7 = 10/2 -1/2
34x/7 = 9/2
34x = (9/2)*7 = 63/2
x= (63/2) / 34
x = 63 /(2*34) = 63/ 68
d)
5x = 5x-10 +3 = 5x -7
5x = 5x-7
impossible!
