You buy 5 pounds for 35$. how much does one pound cost?

one pound costs $7

Step-by-step explanation:

We can use proportion to solve this problem

Let x represent the cost of one  pound

5 pounds = $35

1 pound    = x

Cross-multiply

5x  = 35

Divide both-side of the equation by 5

 =  

(On the right-hand side of the equation, 5 at the numerator will cancel-out 5 at the denominator leaving us with just x, while on the left-hand side of the equation 35 will be divided by 5)

x = $7

Therefore, one pound costs $7