40,000 is 10 times as much as 4,000
What you do is stack the fractions and subtract 9-3 and you get 6 and bring down the 8 and subtract 5-3 and you get 6 6/8
You can plan retirement now to know what you will do later on and plan on how much money you will collect
Equation::
value + value = value
80x + 60(50-x) = 74*50
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80x + 60*50 - 60x = 74*50
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20x = 14*50
x = 35 lbs (amt. of 80 cent tea to use)
50-x = 15 lbs (amt. of 60 cent tean to use)