# How do we make x the subject

4x=y

 amashhour Posts: 2, Reputation: 1 New Member #2 Nov 21, 2009, 08:08 AM
4x=y
 s_cianci Posts: 5,481, Reputation: 4046 Über Member #3 Nov 21, 2009, 08:26 AM
What exactly is your question? If you need to solve your equation for x, then divide both sides by 4.
 Perito Posts: 3,141, Reputation: 781 Ultra Member #4 Nov 21, 2009, 08:28 AM
Quote:
 Originally Posted by amashhour 4x=y
Divide both sides of the equation by some quantity intended to isolate the "x". For example. Given the following equation, how can we make x the "subject"?

32x = 64y

If we divide both sides by 32, we'll get this:

$\frac {\cancel{32}x}{\cancel {32}} = \frac { \cancel {64}^{2}\, y}{\cancel{32}}$

$x = 2y$ Viola!
 mathwiz3502 Posts: 121, Reputation: 8 Junior Member #5 Nov 28, 2009, 03:38 PM
Divide by 4
X=y/4
I believe that there are much more difficult problems in which you have to make x the subject.

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