Final answer:
To solve the equation -3 = 15 + 4y, subtract 15 from both sides and then divide by 4 to find that y = -4.5 (rounded to the nearest tenth).
Step-by-step explanation:
To solve for y in the equation -3 = 15 + 4y, you need to isolate y on one side of the equation. First, subtract 15 from both sides to get -3 - 15 = 15 - 15 + 4y, which simplifies to -18 = 4y. Next, divide both sides by 4 to get -18/4 = 4y/4. Therefore, y = -4.5 (rounded to the nearest tenth).
Learn more about solving linear equations