The value of Randy’s monthly allowance is $40
What is the allowance of Randy?
The allowance of Randy that he receive from his parents d dollars, hence, the total expenses and balance left after expenses is "d"
In essence, the half of the allowance placed in the bank account is 0.5d, which means d is 0.5d plus $8 used for books and the balance of $12
d=0.5d+8+12
We can now go ahead and solve for d
d-0.5d=8+12
0.5d=20
d=20/0.5
d=40
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