Respuesta :
The answer is 5. Because we subtract 5 from both sides, subtract from 5 from 20 to get 15, divide both sides by 3 and then divide 15 by 3 to get 5z
Answer:
w = 5
Step by step explanation:
5 + 3 (w) = 20
first do 3 times what = 15
now its 5 + 15 = 20
so w = 5