Gavin paid for 4 pounds of bananas with a $10 bill he was given back $6.40 what was the cost of 1 pound of bananas write an equation that has a variable

the equation is 4t = 3.60

The cost of 1 pound of banana is $0.9

Step-by-step explanation:

Let t represent the cost of 1 pound of banana in dollars.

Gavin paid for 4 pounds of bananas. This means that the total cost of 4 pounds of banana will be 4× t = $4t

He gave a $10 bill to the seller and he was given back $6.40. This means that the actual cost of 4 pounds of banana would be

10 - 6.40 = $3.60

Therefore,

4t = 3.60

t = 3.60/4 = $0.9

i do not know this sorry : (