16. Angela earns a weekly allowance at the start of each week. She started the week with just her weekly allowance. Then, she spent half of her weekly allowance at the movies. To earn more money, her parents let her clean the windows in the house for $5. What is her weekly allowance if she ended the week with $8? Solve using arithmetic or algebra, and explain your step
Let x be Angela's weekly allowance.
She spent half of her weekly allowance at the movies, which is x/2.
After spending her weekly allowance, she earned $5 from cleaning the windows.
Thus, she had x + $5 - x/2 = 8 left at the end of the week.
Multiplying the equation by 2, we get 2x + 10 - x = 16.
Combining like terms, we have x = 6.
Therefore, Angela's weekly allowance is $6.