Chris M. answered • 09/06/19

Scientist and Maker with Experience in K-12 Education

Hi Gabriel,

Based on the way the question is phrased, I'm assuming you're looking for a solution in terms of *n*. (If that's not the case please let me know).

First, let's assign the other number a variable name. Here I'll use *x*. Now we can write and equation with our variables:

*x - n = 25*

Note that the equation needs to be written in the order x - n because we know n is the smaller number. If we had written n - x the equation would give us a negative number because x is bigger than n.

So now we simply solve the equation for x by adding n to both sides.

*x = 25 + n*

That is to say that the difference of two numbers where n is the smaller number will be 25 when the other number is n + 25.

Hope that helps!