Me how do i solve this i'm stressed and i'm crying rn because i don't understand it

I believe you calculate the sum of the positive numbers in other words you can add the numbers that sum to multiples of 10. 11x+7+50+120
                                                                             11x+170
                                                                                11x+177

10 issues

Step-by-step explanation:

If my friend gets the first 2 issues free, then the remaining issues will be (12-2) = 10 issues .

for 12 issues my friend paid,

1 issue = $1.5

10 issues = 10 × $1.5 = $15

So, it matched which the question, which is $15 spent by my friend.

Answer = 10 issues