Ms. Match went to a store, spent half of her money and then $10 more. She went to a second store, spent half the money she had left and then $10 more. She then had no money left. How much money did Ms.Match have when she started out?
Mathematics · Middle School · Thu Feb 04 2021
Answered on
Let Ms. Match had $ x money
Now, she spent half half of that and $10 in store 1
So, x - (x/2 + 10)
=( 2x - x - 20)/2
=( x - 20)/2
Now, she spent half the money left (x - 20)/4 and $10. Then, she had no money left . It can be represented as
(x - 20)/2 - [(x - 20)/4 + 10)] = 0
(x - 20)/2 - [(x - 20 + 40)/4] = 0
(x - 20)/2 - x + 20 - 40)/4= 0
(2x - 40 - x - 20)/4 = 0
x - 60 = 0
x = 60
Thus, Ms. Match had $60 at the start.