Let
x and y the numbers
we have that
x+y=880,000 -------> equation A
x-y=220,000 ------> equation B
solve the system of equations
solve by elimination
x+y=880,000
x-y=220,000
----------------------
2x=880,000+220,000
2x=1,100,000
x=550,000
Find the value of y
550,000+y=880,000
y=880,000-550,000
y=330,000
the numbers are
550,000 and 330,000
