Question 196398
the sum of two numbers is 18. their difference is 22. what are the numbers?
:
x + y = 18
x - y = 22
-------------addition eliminates y, find x
2x = 40
x = 20
:
Find y:
20 + y = 18
y = 18 - 20
y = -2
;
:
Check solution in 2nd equation:
20 -(-2) = 22