Answer:
To solve for d, we have to isolate it from the other terms.
28 = d/4 + 24
Subtract 24 from both sides.
28 - 24 = d/4 + 24 - 24
Simplify terms in both sides.
4 = d/4
Multiply both sides by 4.
4x4 = d/4 x 4
Simplify terms on both sides.
d = 16
Hope this helps! :)