Answer :

sugarmate
x + y = 5

y = -x + 5

y = -1*x + 5

The slope of the line is the coefficient of the x term when the equation is written in y = mx + b form.

So, the slope of x + y = 5 is -1.
haminhnguyen
I think my answer will help you:
Step 1: x+y=5
Step 2 : I translate x in the other side like this y= -x + 5