Inactive Tutor answered 10/19/14
Tutor
New to Wyzant
400 + 30d < 104d
400 < 104d - 30d Subtract 30d from both sides.
400 < 74d Evaluate the right-hand side.
200 < 37d Divide both sides by 2.
200/37 < d Divide both sides by 37.