Answer:
Each son received from their mother $287.50
Explanation:
3(x - 275) = x - 250
2x = 825 - 250
x = 287.50
$287.50 - $275 = $12.50
Check the answer:
After spending the older son has $12.50
$287.50 - $250 = $37.50
After spending the younger son has $37.50
$37.50 ÷ $12.50 = 3 times