SOLUTION: I have to solve for x. a/3 = x/21

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: I have to solve for x. a/3 = x/21      Log On


   

Question 129433: I have to solve for x.
a/3 = x/21
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Solve for x:
a%2F3+=+x%2F21 Multiply both sides by 3.
a+=+3x%2F21 Multiply both sides by 21.
21a+=+3x Finally, divide both sides by 3.
7a+=+x