Joan spent half of her allowance going to the movies. she washed the family car and earned $6. what us he weekly allowance if she ended up with $16

Her allowance is $20. If she ended up with $16 then you subtract the $6 she earned from washing the car which leaves you with $10. Then you multiply the $10 by 2 since she spent half of her allowance at the movies. That gives you $20.