Respuesta :

wegnerkolmp2741o

Answer:

r=0

Step-by-step explanation:

34r-12+8r=-12

Combine like terms

42r - 12 = -12

Add 12 to each side

42r-12+12 =-12+12

42r = 0

Divide each side by 42

42r/42=0/42

r =0