Question

12/4= /5 wat is the blank

Answer 1

15

Answer 2

UnkleRhaukus, it may help her if you explained how you arrived at that solution.

Answer 3

12/4 = x / 5

4x = 60

x = 15

Answer 4

And does that make sense Snowball? Are you able to do one on your own? Thanks Directrix.

Answer 5

i think u multiply 12 and 5 and then get answer that doesn' tmake sence

Answer 6

Ok, I see. When you have an equation, you can do the same thing on both sides, it remains an equation. So if you add 10 to the right hand side, you can add 10 to the left hand side and it will still be an equation. With me?

Answer 7

Now, we are trying to find out what is the number that is above 5, so we represent the blank by a x.

Answer 8

The next step is to simplify it. We want all the terms with x on one side of the = and all the terms without x on the other side.

Answer 9

I would cross multiply.

Answer 10

i am with msmer

Answer 11

\[12/4=3\]
\[x/5=3\]\[x=15\]

Answer 12

Multiply both sides by 5. On the left you have, 5 x (12/4) and on the other side you have 5 x (x/4) What do you get then ? What happens when you multiply 5 into x/4

Answer 13

This means:

\[\frac{12}{4} = \frac{x}{5}\]

To cross multiply, you multiply the numerator of one fraction with the denominator of the other fraction.

Answer 14

I like Unkle's solution as well.

Answer 15

5*12 = 4*x

Answer 16

why do it the hard way for?

Answer 17

60 = 4x

Answer 18

x = 15

Answer 19

GIVE ME THE EASY WAY ONE STEP AT A TIME OK DRAW IT

Answer 20

Ok, snowball, go back to my last post, Are you with me?

Answer 21

no draw it

Answer 22

unklerhaukus: for this particular problem, your solution would be easier because 12/4 simplifies to 3. However, in a case such as 13/4 where it does not simplify into a nice number, cross multiplying will be much easier - I thought it would be good to show snowballhockey how to set that up.