You can
put this solution on YOUR website!Remember the sum of two numbers is simply the result of adding them. So the sum of x and y is

. In this particular problem, the first addend is the unknown number 'x' and the second addend is 36 times its reciprocal. In other words, the second number is
So add these two expressions to get:

and set that equal to -13 to get
I'll let you take it from here. All you need to do now is solve

for 'x'.