Keith spent half of his allowance going to the movies he washed the family car and earned $7 dollars what is his weekly allowance if he ended with 15 dollars?

Question

anonymous · Answer

1 week = 7 days,
x be his weekly allowance
(x+7)-0.5x=15
0.5x = 8
x = 16

So he gets 16 dollars a week. cheers

anonymous · Answer

but how tho if he ended w/15 dollars?

anonymous · Answer

easy you work backwards from here, so!

if he gets 16 dollars a week, he get extra 7 dollars for washing the car, so total 23, then he went movie which cost him 8dollars because the question states he spend half his allowance which we know 16/2 = 8!

so 23-8=$15 left

WALA!

anonymous · Answer

WOW u are smart thank you so much!!!!!!!!!!!!!!!