The grocery store sells kumquats for $4.75 a pound and Asian pears for $2.25 a pound. Write a equation in standard form for the weights of kumquats K and Asian pears P that a customer could buy with $22.
A4.75k + 2.25p = 22
B4.75k = 2.25p +22
C4.75 + 2.25 = k
D4.75p + 2.25 = 22
A4.75k + 2.25p = 22
B4.75k = 2.25p +22
C4.75 + 2.25 = k
D4.75p + 2.25 = 22