Résoudre les équations suivante :
a) x + 7 = -2
b) 5 + x = 8
c) x - 4 = 8
d) -x + 12 = -1
e) -x -4 = 8
f) 7 - x = -3
a) x + 7 = -2
b) 5 + x = 8
c) x - 4 = 8
d) -x + 12 = -1
e) -x -4 = 8
f) 7 - x = -3
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x=-2-7
x=-9
b) 5+x=8
x=8-5
x=3
c) x-4=8
x=8+4
x=12
d) -x+12=-1
-x=-1-12
x=13
e) -x-4=8
-x=8+4
-x=12 x=-12
f) 7-x=-3
-x=-3-7
-x=-10 x=10
x= -2 -7
x= -9
B = 5+x=8
x=8-5
x=3
C) x-4=8
x=8+4
x=12
D) -x+12=-1
-x=-1-12
x= -13
E) -x-4 = 8
-x= 8+4
-x=12
x=-12
F) 7-x = -3
-x=-3-7
-x=-10
x = 10