Respuesta :

Advent5647

Answer:

- 6

Step-by-step explanation:

Step 1:

2x - 9 = - 21       Equation

Step 2:

2x = - 12       Add 9 on both sides

Step 3:

- 12 ÷ 2     Divide

Answer:

x = - 6

Hope This Helps :)

wegnerkolmp2741o

Answer:

x = -6

Step-by-step explanation:

Let x = unknown number

2x -9 = -21

Add 9 to each side

2x -9+9 = -21+9

2x = -12

Divide by 2

2x/2= -12/2

x = -6

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