Question #6edb3

1 Answer

d = 4d=4

Explanation:

41 = 12d - 741=12d7

Add 77 to both sides..

41+7 = 12d - 7 + 741+7=12d7+7

48 = 12d48=12d

Divide both sides by 1212

48/12 = (12d)/124812=12d12

48/12 = (cancel12d)/cancel12

48/12 = d

d = 4