Question

solve for X (1/3)+(1/5)=(1/x)

Answer 1

Start by multiplying both sides by x. What do you get then?

Answer 2

1/3x+1/5x=x^2 idk

Answer 3

x/3 + x/5 = 1

Answer 4

You are sort of right...

Answer 5

Now to get rid of the fractions, you can multiply both sides by 15. (Does that make sense, why I'm doing that?)

Answer 6

no

Answer 7

If I wanted to get rid of the x/3, I would multiply by 3, because 3 * x/3 = x. Does that make sense?

Answer 8

yes

Answer 9

And if I wanted to get rid of the x/5, I would multiply by 5, because 5 * x/5 = x. For the same reason.
We want to multiply by 3 _and_ 5, so we just multiply by 15. Does that make sense?

Answer 10

yeah so what do i do next

Answer 11

Well, we have 5x + 3x = 15, after multiplying 15.
That makes 8x = 15.
Now this is just a simple equation. After solving it, what do we get?

Answer 12

x=1.85

Answer 13

Or x = 15/8.
And that's our answer!

Answer 14

awesome thank you

Answer 15

No problem