How do you solve #-x + y = 12# and #x + 2y = 3#?
2 Answers
Explanation:
All you really ahve to do to solve this system of equations is add the left side and the right side of the equations separately to eliminate the variable
To get the value of
Now use this value of
Add
I found:
Explanation:
You can add the two equations (in column):
so
substitute this value into the first equatiom: