# Can somebody help me rearrange this formula please?

• Apr 22nd 2010, 11:51 AM
Mikeysharkface
Can somebody help me rearrange this formula please?
I've been trying to figure this out for hours now. could anybody help out?

I have to make x the subject of the formula

7 = 3 + x

any help would be greatly appreciated because this is driving me insane
• Apr 22nd 2010, 12:01 PM
melvis
Quote:

Originally Posted by Mikeysharkface
I've been trying to figure this out for hours now. could anybody help out?

I have to make x the subject of the formula

7 = 3 + x

any help would be greatly appreciated because this is driving me insane

I'm not sure what you are looking for but the only thing that can be done is

x = -3 + 7
x = 4
• Apr 22nd 2010, 12:08 PM
Wilmer
Quote:

Originally Posted by Mikeysharkface
I have to make x the subject of the formula
7 = 3 + x

C'mon Mikey: 3 + WHAT = 7 ? Yes, it's that simple (Wink)

And that's not a "formula"; it's an equation.
• Apr 22nd 2010, 12:09 PM
Mikeysharkface
I am looking to make x the subject so x= (something)

so you subtracted x from both sides to give 7 - x = 3?
• Apr 22nd 2010, 12:17 PM
Mikeysharkface
Wilmer
I could figure it out if it was a simple equation like that because the answer is obviously 4. But the questionvwhich i have to answer says:
Make x the subject of the formula 7 = 3 + x
• Apr 22nd 2010, 12:18 PM
melvis
Quote:

Originally Posted by Mikeysharkface
I am looking to make x the subject so x= (something)

so you subtracted x from both sides to give 7 - x = 3?

try subtracting 3 ;)
• Apr 22nd 2010, 12:24 PM
Mikeysharkface
Melvis
If I subtracted 3 from 7 = 3 + x it would leave me with x = 4

it can't be that easy, surely
• Apr 22nd 2010, 01:02 PM
undefined
Quote:

Originally Posted by Mikeysharkface
Melvis
If I subtracted 3 from 7 = 3 + x it would leave me with x = 4

it can't be that easy, surely

Your terminology is odd to me. I've never heard "make x the subject." What I have heard is, "Solve for x." And yes, it's that easy.
• Apr 22nd 2010, 01:47 PM
Wilmer
Quote:

Originally Posted by Mikeysharkface
If I subtracted 3 from 7 = 3 + x it would leave me with x = 4
it can't be that easy, surely

YES it is that simple. Yer suffering of "paralysis by analysis" (Giggle)

x is equal to four ; x = subject, is = verb, .... (Rock)
• Apr 22nd 2010, 02:22 PM
Mikeysharkface
Thanks guys, very much appreciate your help.

I'll let you know how I get on
• Apr 22nd 2010, 02:23 PM
Mikeysharkface
undefined
Quote:

Originally Posted by undefined
Your terminology is odd to me. I've never heard "make x the subject." What I have heard is, "Solve for x." And yes, it's that easy.

it's a rearranging forumla question
• May 13th 2010, 06:02 AM
Mikeysharkface
Thanks for the help!
It was that simple, cheers guys.