Casey spent half of his weekly allowance on pokemon cards. to earn more money his parents let him wash the car for $7. what is his weekly allowance if he ended with $17.
well if we take the 17 he ended up with and subtract the 7 extra he got, his weekly allowing would be $10. the equation would be set up like so: x+7=17 so again you'd just subtract the 7 and end up with 10
