Respuesta :

Answer:

Step-by-step explanation:

hello :

19=3s+4

19-4 = 3s+4-4

3s=15

s=15/3

s=5

S=4

Explanation
Subtract 4 from both sides
19=3s+4 -> 15=3s
Then divide both sides by 3, allowing the s to be isolated.
15=3s divide by 3 -> 5=s