Answer:
the answer is 7 over 9932!
Step-by-step explanation:
here's the solution : -
if i made 9 costumes and it is 30 % of total costumes, so lets take the total number of costumes as <u>x</u><u> </u>
so, by above statement we get,

=》

=》

so, total number of costumes = 30 costumes.
Answer: he worked 32 hours and make $512
Just substitute from given equation r-w=7a-7a/5= 28a/5