Amount invested in stocks = 46,000
Let "x" be the amount invested in bonds
The amount invested in stock is also = 3x - 8,000
We equate the two amounts above (Since both are related to stock investments), we get,
3x-8000 = 46000
3x = 54000
x =54000/3
x =18000
Amount that Laurie has invested in bonds = $18,000