heidi spent 1/2 of her babysiting money on a dvd and 1/2 of the remaining amount on a pair of jeans. after she spent $15.75 at the movie theater. she had $7.80 left. how much money did heidi earn babysiting? please help!!!!!!

Question

anonymous · Answer

ill help :) give me amin to write it out

anonymous · Answer

ok

anonymous · Answer

she had 94.20$

anonymous · Answer

want me to explain how i got that?

anonymous · Answer

yes

anonymous · Answer

ok lets let T represent the total amount that she made ok?

anonymous · Answer

so, after she bought the DVD 1/2 T was left right?

anonymous · Answer

after that it said she spent that half, which is technically, 1/4 of the total.

anonymous · Answer

following that from the 1/4 of the total, she spent another 15.75$
meaning that you are now left with 1/4 of the total amount she made - 15.75$

anonymous · Answer

so if we know that wat she has left is 7.80$, then we can say that 
1/4 T(total she made) -15.75 = 7.80

therefore u isolate for T

anonymous · Answer

this will then give you 1/4T = 23.55
multiply out the 4 from the left side, and multiply the right side by 4 as well, 
and u get
T= 94.20$ 

hope that helps

anonymous · Answer

do you understand how i got the answer?

anonymous · Answer

yes

anonymous · Answer

ok