# Expressing x in terms of other variables...

• Sep 27th 2011, 01:02 PM
ryanch94
Expressing x in terms of other variables...
I think i have the hang of these but I wanna check with you guys to make sure..so could you tell me if this is right?

Express x in terms of other variables:

$5x - 4 = \frac{y}{2}$

$5x(2) - 4(2) = \frac{y}{2}(2)$

$10x - 8 = y$

$10x = y + 8$

$x = \frac{y + 8}{10}$

Also could I have help with the following:

Make the letter in brackets the subject of the formula in each of the following:

$2x - \frac{y}{3} = \frac{1}{3}$...(x)

Is it just the same method as the first problem?
• Sep 27th 2011, 01:09 PM
Quacky
Re: Expressing x in terms of other variables...
Great work so far! Start the second by multiplying both sides by 3.
• Sep 27th 2011, 01:34 PM
ryanch94
Re: Expressing x in terms of other variables...
Thanks! :D