Explanation : In this case we have a perfect scenario because the y terms are additive inverses. When the two equations are added, the y terms will add to 0.
In this case we have a perfect scenario because the y terms are additive inverses. When the two equations are added, the y terms will add to 0.
2x+y=5
x−y=1
A + B:
3x=6
x=2
Substitute
in B
2−y=1
2−1=y
1=y
