The remaining balance in the second account is $1,020
The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value.
Let x = the balance in the first account.
Let y = the balance in the second account.
The total amount in the two accounts is $73,000, therefore
x + y = 73,000 (1)
Grayson withdraws 25% of x and 75% of y for a total of $27,820 .
Therefore
0.25x + 0.75y = 27,820
or
25x + 75y = 27,82000 (2)
Subtract (1) from (2).
y = 25500
From (1), obtain
x = 6450
The remaining balance in the second account is $1,020
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