Hannah has 127 books in her collection. her school is hosting a book donation. there are z students at her school, and they each plan to donate the same number of books and reach a total donation of 300 books! how many books will hannah have in her collection after her donation? write your answer as an expression.

answer is c

step-by-step explanation:

81/12=324/x

x=48

108sqtroot3xy

step-by-step explanation:

x=-2

step-by-step explanation:

i began by flipping the problem to give me x= on the left (keeps it clearer for me).   so my problem simply became 10x-3=4x-6.  

1)   subtract 4x from the right side, which equals 0.   you do the same to the left of the equal as the right; therefore, subtract 4x from 10x, leaving 6x on the left.

              10x-3=4x-6   :   4x-4x on the right leaves only the -6        

2)             6x-3= 0-6 :    

                6x+3=   -6

3) divide