let

c = the cost of 1 box of crayons

p = the cost of 1 ream of paper

A student bought 1 box of crayons and 5 reams of paper for $54:

c + 5p = 54

She bought 5 boxes of crayons and 3 reams of paper for $50:

5c + 3p = 50

by solving the system of equations:

c + 5p = 54

5c + 3p = 50

we find:

c = $4

p = $10

click here to see the step by step solution of the system of equations:

the cost of each box of crayons is $4.

the cost of each ream of paper is $10.