hlp

Solve for d:
5 (4 d+8) = 40

Divide both sides of 5 (4 d+8) = 40 by 5:
(5 (4 d+8))/5 = 40/5

5/5 = 1:
4 d+8 = 40/5

The gcd of 40 and 5 is 5, so 40/5 = (5×8)/(5×1) = 5/5×8 = 8:
Answer: | 
| 4 d+8 = 8

d=0