we are given

Firstly , we will multiply both sides by 5

now, we can simplify it


now, we can solve for n
.............Answer
Don’t know if there’s much of an equation for it, but I guess the best way to write it out is 10 + x = -18. Then, you would subtract the 10 from both sides in order to isolate the x. So then you’re left with x = -28. So -28 is your answer.
X would equal 9. Subtract 18 from both sides then divide by two to get 9 as X
17.94
Because 15% of $6 is .9 so
2.6x6.9=17.94