Respuesta :

Answer:

x = 9.9

Step-by-step explanation:

Step 1:  Solve for x

Add 2.1 to both sides...

-2.1 - x + 2.1 = -12 + 2.1

-x = -9.9

Multiply both sides by -1...

-x * -1 = -9.9 * -1

x = 9.9

Answer:  x = 9.9