Alyssa spent half of her allowance going to the movies. She washed the family car and earned $7. What isher weekly allowance is she ended with $13?

The equation is x/2+7=13

She spent half her allowance on the movies and gained seven dollars for washing the car and she ended up with $13.

Get x by itself by misusing 7 from each side.

This gets you x/2=6.

Then multiply 2 to both sides.

This gets you x=12.

Her weekly allowance is $12.