Answer
One of the charities receives 33,500 dollars and the other receives 15,500 dollars.
Work Step by Step
Let $x = $ one of the the charities
$x + (x - 18,000) = 149,000$
$2x - 18,000 = 149,000$
$2x = 67000$
$x = \frac{67000}{2}$
$x = 33,500$ dollars
Let $O = $ the other charity
$O = x - 18,000$
$O = 33,500 - 18,000$
$O = 15,500$ dollars