Data: (adopting)
Y = $4.90
K = 2 boxes
x = ? (how much in each box)
Solving:
[tex]Y = K*X [/tex]
[tex]4.90 = 2*X[/tex]
[tex]4.90 = 2X[/tex]
[tex]2X = 4.90[/tex]
[tex]X = \frac{4.90}{2} [/tex]
[tex]\boxed{\boxed{X = \$\:2.45\:each\:box}}\end{array}}\qquad\quad\checkmark[/tex]