Answer:
$16.
Explanation:
Let x represent Benny's weekly allowance.
We have been given that Benny spent half of his allowance going to the movies. So money spent on movies would be
.
We are also told that he washed the family car and earned 8 dollars. So money after washing the car would be
.
Since Benny ended with 16 dollars, so we can equate
to 16 to solve for x as:





Therefore, Benny's weekly allowance is $16.