Question

At a student government fundraiser, a notebook costs $6 and a t-shirt costs $12. if the total received for 90 items was $600, how many notebooks were sold? 20 40 60 80

Answer 1

Answer:80 notebooks

Step-by-step explanation:

If n is the number of notebooks and t is the number of t shirts the 2 equations that can be made are this:

$6n+12t=600\\n+t=90$

You can solve this by,

$t=n+90\\6n+12(90-n)=600\\6n-12n+1080=600\\-6n=-480\\n=80$So 80 notebooks.