Answer:
32 and 19
Step-by-step explanation:
Let's call the numbers x and y.
Write out the equations
x + y = 51
x - y = 13
Simplify the second equation
x = 13 + y
Substitute into the first equation and simplify
(13 + y) + y = 51
13 + 2y = 51
2y = 51 - 13
2y = 38
y = 19
Substitute y for 19 in the second equation
x = 13 + y
x = 13 + 19
x = 32
