Hey there!
Answer = -3(x = -3)
Step-by-step explanation:
Question:
3 + 5x = -12
Simplify both sides of the equation:
5x + 3 = -12
Subtract three from both sides:
5x + 3 - 3 = -12 - 3
Divide both sides by five:

x = -3
So therefore, that is how you found your answer: x = -3