How do you solve #x+y= -1# and #x-y=3#?
1 Answer
Aug 3, 2015
Explanation:
One way is to use the method of elimination.
Step 1. Enter the equations.
[1]
[2]
Step 2. Add Equations 1 and 2.
[3]
Step 3. Substitute Equation 3 in Equation 2.
Solution:
Check: Substitute the values of
It checks!
Our solution is correct.