Respuesta :

Answer:

r = 72

Step-by-step explanation:

1/6r + 2 = 1/9r + 6

1/6r - 1/9r = 6 - 2

3/18r - 2/18r = 6 - 2

1/18r = 4

r = 4 / 1/18

r = 4 * 18

r = 72