hello
the yearly income was $2100
the appraised value = $40,000
one of the stocks pays 4% annually
the other pays $690 yearly
let's find how much the 4% stock pays annually
to do this, let's subtract the income of one of the stocks from the total income. i.e 690 from 2100

the other stock pays $1410 annually
now we can simply find the value of each stock

the value of one of the stock is $35250
we can proceed to find the value of the other stock by subtracting 35250 from 40000 which is the value of the two stock

from the calculations above, the value of the stocks is $35250 and $4750