Respuesta :

Answer:

-20 =r

Step-by-step explanation:

4r - 8 = 5r + 12

Subtract 4r from each side

4r -4r- 8 = 5r + 12-4r

-8 = r+12

Subtract 12 from each side

-8-12 = r+12-12

-20 =r

Answer:

-20 = r

Step-by-step explanation: