Question

Plums are $3.25 for 2 pounds, i need 4 pounds. how much will it cost

Answer 1

`(3.25)/(2lbs) = (x)/(4lbs) \\ (3.25)/(2) * (2)/(2) = (x)/(4) \\ (3.25 * 2)/(2*2) = (x)/(4) \\ 3.25*2 = x \\ x = 6.50`
It will cost $6.50 for four pounds of plums.

Hope this helps!