Question

tom spent half of his allowance going to the movie he washed the family car end earned 7 dollars what is his weekly allowance if he ended with 12 dollars

Answer 1

12 - 7 is half of his allowance which is 5
so his full allowance is 5 times 2 or...
10

Answer 2

you start with 12 - 7 = 5 , then you would multiply the 5 * 2 = 10.00 a week