if 6 notebooks + 2 binders = 23.52

Question

ans 3 notebooks + 4 binders = 25.53
how do I solve to find out what the notebooks and binders each cost?

Answer 1

6n + 2b = 23.52
3n + 4b = 25.53

multiply the 1st equation by 2 and you have

12n + 4b = 47.04
3n + 4b = 25.53

now subtract to get

9n = 21.51
n = 2.39

Now you can get b

Answer 2

8 more than a number p is 17