Answer:
her weekly allowance is $16
Explanation:
Let x represent Imani's weekly allowance.
Imani spent half of her weekly allowance playing Mini-golf. This means that the total amount that she spent playing Mini-golf is x/2. The amount that she is left with would be
x - x/2 = x/2
In order to earn more money her parents let her wash the car for $4. This means that the total amount left with her is
x/2 + 4
if she ended with $12, it means that
x/2 + 4 = 12
x/2 = 12 - 4 = 8
x = 2 × 8 = $16