Question

Solve for c: 6/13=3/c
Can you show me the formula for this?

Answer 1

C= 6.5
I used the butterfly method or the cross multiplication way.
6*c=13*3
The equations will now be
6c=39

Since you want the variable to be by itself, divide both sides by 6

39/6=6.5

3
6.5
x 6
_________
39.0