Question

You can solve the following proportion by cross multiplying. What will the equation be after you cross multiply?

3/9 = x/15

Answer 1

X = 5 is the answer

Answer 2

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

3/9-(x/15)=0
x
Simplify ——
15

3 x
—— —— = 0
9 15

1
Simplify ——
3

1 x
—— —— = 0
3 15

... the answer is : x = 5