Five stars notebooks cost $4.00 more than cvs notebooks. if marina were to buy 8 five stars notebooks then she will have to spend $16.00 more than if she were to buy 10 cvs notebooks. how much does each notebook cost? need asap

For this case, the first thing we must do is define variables:
 x: cost of Five Stars notebooks
 y: cost of CVS notebooks
 We now write the system of equations:
 x = y + 4
 8x = 10y + 16
 Solving the system of equations we have:
 x = 12 $
 y = 8 $
 
 Five Stars notebooks = $ 12
 CVS notebooks = 8 $