The difference between 15 and a number is negative five

Question

I need the algebraic expression for this statement, I think it’s 15-n = -5 but I don’t think algebraic expressions are supposed to have an equal sign.

Answer 1

15-n = -5

-n= -5-15 = -20

n=20, the number is 20

the word "is" translates mathematically as "equals" or =