Respuesta :
Add the answer by the next equation.
5 + 7 = 12
12 + 9 = 21
21+19 = 40
Hope you pick me as brainliest
5 + 7 = 12
12 + 9 = 21
21+19 = 40
Hope you pick me as brainliest
You add the answer to the numbers you're adding, like 1+4+0=5, 2+5+5=12, and so on. So the answer would be 40, because 21+11+8=40.