Can you solve this math problem?

My friend gave me this Alg 2 question, being a fairly smart lad I attacked it with full force!!! But I got amazingly confused, I don't even think it CAN be solved D: Anyway, thats why your here. To prove me wrong.
$105-40=65+H=$120
H=Hours Worked
($10/Hour)
Solve for H
$105-40=65+H=$120
H=Hours Worked
($10/Hour)
Solve for H