look up on youtube TWINMUSCLEWORKOUT and youll find what you need.
okay but this is what you can do with your equipment ill give you a good routine that i can think of with what you have.
for mass 8-12 reps but if this is too easy because you only have 20 pnds then do more reps like 20
3sets of each exercise with a 1min break in between sets. 45min max workout no longer look it up if you dont know why 45min
MONDAY
dumbell bench press
pushups 30 ,20, 10 those are the number for your sets
dips - you can use an object such as a bed or something for this like a chair. do 3sets -reps- 40,30,20
pull ups - pull ups are different then chin ups look it up and do as many as you can for 3 sets
dumbell military press.
Tuesday rest or cardio
WEDNESDAY
bicep curls
hammer curls
close grip chin ups as many as you can do for 3 sets
THURSDAY rest or cardio
FRIDAY
front shoulder raises - looks like your a walking zombie
Side shoulder raises - looks like a brid flapping wings
Forearm curls - palms facing you and then do palms facing away,
shoulder shrugs
pullups
diamond pushups
REST FOR THE WEEKEND