Respuesta :

megadoodoo

Answer:

C

Step-by-step explanation:

9x+4.5-2x=2.3+7x+2.2

9x-2x+4.5=2.3+7x+2.2

7x+4.5-4.5=7x+4.5-4.5

7x=7x

7x-7x=7x-7x

0=0