Respuesta :
Answer:
X = -6
Step-by-step explanation:
3x+9 = 5x+21
3x-5x=21-9
-2x=12
-X= 12/2
-x=6
Multiply both sides by (-1)
-x*-1 = 6*-1
X = -6
Answer:
X = -6
Step-by-step explanation:
3x+9 = 5x+21
3x-5x=21-9
-2x=12
-X= 12/2
-x=6
Multiply both sides by (-1)
-x*-1 = 6*-1
X = -6