Question

Solve the system x+y=3 , x-y=1

Answer 1

x = 2, y = 1.

Explanation:

x+y=3

x-y=1

Adding the 2 equations eliminates y:

2x = 4

x = 2.

Substitute for x in the first equation:

2 + y = 3

y = 3-2 = 1.