PLEASE HELP!!! The grocery store sells kumquats for $3.75 a pound and Asian pears for $2.25 a pound. Write an equation in standard form for the weights of kumquats k and Asian pears p that a customer could buy with $14.
3.75k + 2.25p = 14
3.75 + 2.25 = k
3.75k = 2.25p + 14
3.75p + 2.25k = 14