Question 36432
You are right in saying that you have no variable left, but finish up the problem then you can interpret the result.
{{{3x-4((3/4)x-2) = 8}}}
{{{3x-3x+8 = 8}}}
{{{8 = 8}}} No variable but the equation is valid (8 = 8).
This means that all values of x and y that satisfy the one equation will also satisfy the  second equation...why?
Well, this is easier to see if you get both equations into the slope-intercept form:
1) {{{3x-4y = 8}}} Subtract 3x from  both sides.
{{{-4y = -3x + 8}}} Divide both sides by -4.
1) {{{y = (3/4)x - 2}}}

2) {{{y = (3/4)x - 2}}}

You can see immediately that the two equations represent the same line so any point that lies on the first line will also lie on the second line.