Aperson spends $560,000 on a total of 3 properties. the first property's value is the sum of the other two properties. the second property is three times the value of the third property. how much does each property cost?

3 units + 1 unit = 4 units (the sum of 2nd and 3rd)
4 units + 4 units = 8 units (sum of all properties)
*The other 4 units comes from the first property as the first property's value is the same as the sum of the 2nd and 3rd.*
8 units = $560 000
1 unit = $560 000÷8 = $70 000 (3rd)
3 units = 3x$70 000= $210 000 (2nd)
$210 000 + $70 000=$280 000 (1st)

Ans: 
1st property costs $280 000.
2nd property costs $210 000.
3rd property costs $70 000.

It would be the second one because it passes the vertical line test