Question 704532
x + y = 3
x - y = 5
------------adding eliminates y, find x
2x + 0 = 8
x = 8/2
x = 4
:
In the 1st equation, replace x with 4, and find y
x + y = 3
y = 3 - 4
y = -1
:
In the 2nd equation, check the solutions, replace x and y
4 - (-1) = 5
5 + 1 = 5