I actually don't know of a tutorial, but it's very straight forward.
Go to: TribalDex
Choose POOLS
Choose Add Liquidity
Select the DEC Pool Pair you wish to add liquidity to, i.e. DEC:SPS, DEC:BEE, DEC:SWAP.HIVE, etc...
Select the amount of each you want to add, and click the big execute (Add Liquidity) button below. BOOM!! you're officially a lender!! Welcome to the world of finance!
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