The sum of two numbers is -18. if the first number is 10, which equation represents this situation, and what is the second number?

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.

(1/x + 1)^2 + 6 (1/x + 1) +5