STEP 1:
We want these two numbers to be the same, but have opposite signs. Then, we'll add them together and get 0.
Now, we add Row 1 and Row 2 -- just work straight down! Then, you put Row 1 back to normal:
Row 1 back to normal |
STEP 2:
Now, we work a bit backwards!
We want these two numbers to be the same, but have opposite signs. Then, we'll add them together and get 0.
Now, we add Row 1 and Row 2 -- just work straight up! Then, you put Row 2 back to normal:
Row 2 + |