the sum of two numbers is -6, and their difference is 12. Find the two numbers

Question

How do I set up the equation? I just need an idea and I can try and solve it

 

Answer 1

Two number, unknown, let them be x and y,

The Sum of them: x+y=-6

Difference: x-y=12

Together you have a system of two equations:

x+y=-6
x-y=12

Solve it for x and y. That's all.