Two friends sold many pieces of furniture and made ​$1610 during their garage sale. They had fifteen more​ $10 bills than​ $50 bills. They had 1 more than three times as many​ $20 bills as​ $50 bills. How many of each denomination did they​ have?

Answer 1

Let
w = # fifties
x = # twenties
y = # tens
Then we know that
50w+20x+10y = 1610
y = w+15
x = 3w+1
Now just solve for w,x,y