Respuesta :

TheUnknownScientist

Answer:

x = 42

Step-by-step explanation:

y = x/7 + 15 ; y = 21

21 = x/7 + 15

21 - 15 = x/7

6 = x/7

x = 6 × 7

x = 42

Thus, The answer is 42

-TheUnknownScientist

bhb72

Answer:

x = 42

Step-by-step explanation:

I hope its helps.........