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:

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

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

$\displaystyle 10x - 8 = y$

$\displaystyle 10x = y + 8$

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

Also could I have help with the following:

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

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

Is it just the same method as the first problem?