SOLUTION: {{{(5y-4x)/3=7}}} then x=? A. {{{(7-5y)/12}}} B.{{{(21-5y)/4}}} C. {{{(21-15y)/4}}} D.{{{(5y-21)/4}}} E. {{{21/5y}}}

Algebra ->  Equations -> SOLUTION: {{{(5y-4x)/3=7}}} then x=? A. {{{(7-5y)/12}}} B.{{{(21-5y)/4}}} C. {{{(21-15y)/4}}} D.{{{(5y-21)/4}}} E. {{{21/5y}}}      Log On


   

Question 881699: %285y-4x%29%2F3=7 then x=?
A. %287-5y%29%2F12 B.%2821-5y%29%2F4 C. %2821-15y%29%2F4 D.%285y-21%29%2F4 E. 21%2F5y
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Number Properties! Undo everything which was done to x. This means using inverses - multiplicative and additive inverses.

REASONS FOR POSSIBLE SEQUENCE OF STEPS:
(q) Multiplicative Inverse of %281%2F3%29;
(q) Additive Inverse of 5y;
(q) Multiplicative Inverse of -4.
(q) Finish any simplifications.
DONE.

CHOICE D.