SOLUTION: I am trying to help my 5th grade son with his homework. The problem is c/7 (this is a fraction) = 9. I know how to do it when it is like v+19=39 but the fraction throws me off.

Algebra ->  Inequalities -> SOLUTION: I am trying to help my 5th grade son with his homework. The problem is c/7 (this is a fraction) = 9. I know how to do it when it is like v+19=39 but the fraction throws me off.       Log On


   

Question 422090: I am trying to help my 5th grade son with his homework. The problem is c/7 (this is a fraction) = 9. I know how to do it when it is like v+19=39 but the fraction throws me off.
Found 2 solutions by ewatrrr, Edwin McCravy:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

the principle of isolating the variable is the same in both examples.

 c/7 = 9  |to isolate c in this case, one needs to multiply both sides of EQ by 7

   c = 63

Answer by Edwin McCravy(20055) About Me  (Show Source):
You can put this solution on YOUR website!
c%2F7=9

You multiply both sides by %287%29.  Since %287%29 and %287%2F1%29
are the same I'll use %287%2F1%29 on the left side and %287%29 on
the right

expr%28c%2F7%29%287%2F1%29+=+9%2A%287%29

Now cancel the 7's on the left, and multiply 9*7 on the right.

expr%28c%2Fcross%287%29%29%28cross%287%29%2F1%29+=+63
 
And you end up with

c=63

Edwin