7G2 Homework Help

I think of a number, take 13 and the answer is 98

I tend to use "n" for number, somy expression is .....

n - 13 = 98

now we have to find out what "n" is, so work backwards
98 + 13 = 111

n = 111

let's check to see if that works?

does 111 - 13 = 98? YES!