How do you solve #x-y=9# and #2x+2y=2#?
1 Answer
Nov 13, 2015
- Substitute one value by using the other
- Set equation 1 into equation 2
- Solve like a normal equation.
Explanation:
Rewrite equation 1:
Put
Solve like normal:
#4y = -16
Divide both sides by 4:
Put this value into equation 1:
To sum it up;
