4d+15<=-1 — step-by-step solution

⚠ 4d is read as the product 4*d: for a power, write 4^d

Let's solve in

ℝ

4 d + 15 <= -1

4 d <= - 1 - 15

4 d <= -16

d <= - \frac{16}{4}

▶Solution obtained:

d <= -4