8m+3v=51
2m+5v =34
multiply the 2nd equation by -4
-8m -20v = -136
add 1 and the modified 2nd equation together
8m+3v=51
-8m -20v = -136
------------------------
-17v = -85
divide by -17
v=5
substitute into 1st equation
8m+3v=51
8m +3(5) = 51
8m +15 = 51
subtract 15 from each side
8m =36
m =4.5
Answer: videos are $5.00
movies $4.50