Bonjour pouvez vous m'aidee
C)-7x=2x+9
...............=9
x=.................
D)
-x=-2+4
................=+4
X=...............
C)-7x=2x+9
...............=9
x=.................
D)
-x=-2+4
................=+4
X=...............
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Verified answer
Slt,-7x = 2x + 9
-7x - 2x = 9
-9x = 9
x = 9/-9
x = -1
-x = -2 +4
-x = 2
x = -2
Voilà......