Question 186609
let  put x= CRT plan to be made
         y= LCD plan to be made
we create the equations as follows:

50x+150y= 9600 ......(1)
80x+130y= 8760 ......(2)

equation (1) can be multiply by 8/5 will become; 80x + 240y = 15360 ...(3)
let take (3) subtract (2) we will have: 240y-130y=15360-8760
                                   or:       110y= 6600 then y=60
plan to make 60 LCD and 12 CRT.