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Rearranging the subject of a formula?

procr4stinat0r

heres a question;

Make h the subject of the formula
t= gh/10

Can someone explain how to do this? Thanks

Reply 1

b4tman

Original post by procr4stinat0r

heres a question;

Make h the subject of the formula
t= gh/10

Can someone explain how to do this? Thanks

Means make it h=something
Start by timesing both sides by 10(cancels out the /10) then /g to get h= on RHS

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Reply 2

procr4stinat0r

Original post by b4tman

Means make it h=something
Start by timesing both sides by 10(cancels out the /10) then /g to get h= on RHS

I know this seems really stupid but, can you tell me step by step?

Reply 3

b4tman

[QUOTE="procr4stinat0r;41569426"]

Original post by b4tman

Means make it h=something
Start by timesing both sides by 10(cancels out the /10) then /g to get h= on RHS

I know this seems really stupid but, can you tell me step by step?

1. Times both sides by 10 (to cancel the divide by 10) are left with 10t=gh
2. Divide both sides by g (to cancel out the times by g [no sign between letters means times]) left with (10t)/g =h
As you now have h= something you have made h the subject

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Reply 4

Decerto

[QUOTE="procr4stinat0r;41569426"]

Original post by b4tman

Means make it h=something
Start by timesing both sides by 10(cancels out the /10) then /g to get h= on RHS

I know this seems really stupid but, can you tell me step by step?

Step 1) Times both sides of the equation by ten to get gh on it's own.

t= gh/10 which makes 10 x t = gh

Step 2) Divide both sides by g to get h on it's own.

10 x t = gh which makes 10 x t/g = h

(edited 11 years ago)

Reply 5

RichCooper

Original post by procr4stinat0r

heres a question;

Make h the subject of the formula
t= gh/10

Can someone explain how to do this? Thanks

As long as you do the same thing to both sides of an equation it still holds, therefore first multiply both sides by 10 to give 10t=gh, then divide both sides by g to give 10t/g=h :smile:

If it's h=something, h is the subject of the formula, which we now have in our final equation above!

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Reply 6

procr4stinat0r

THANKS EVERYONE! So basically, as with rearranging every formula the main rule is, dividing to get letters on their own, but as you do so, do the same to the other side?

Reply 7

b4tman

Original post by procr4stinat0r

THANKS EVERYONE! So basically, as with rearranging every formula the main rule is, dividing to get letters on their own, but as you do so, do the same to the other side?

If the only operations are times/divide then most probably yes, if there is addition and subtraction as well it becomes a little more tricky

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