Question

The diffrence of twice a number and 9 is -21

Answer 1

x = -6

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

Answer 2

- 6

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 :)