Question 514217
the sum of two integers is 5. their difference is 13. find the two integers 
.
Let x = one integer
and y = other integer
then
x+y = 5
x-y = 13
.
add both equations together:
x+y = 5
x-y = 13
------------
2x = 18
x = 9
.
substitute above into:
x+y = 5
9+y = 5
y = -4
.
answer 9 and -4