Question 16011
You have a problem in the way you are stating the problems.  In many of your examples, you are giving two equal signs in a given equation.  This cannot be! We can't tell what the problem is supposed to be.  However, to answer your  question anyway, if the equations are NOT in standard form Ax + By = C, where the x and y terms line up nice and neat, IF they don't line up, then you should re-arrange the equation so that it DOES line up nicely!


For example, 
5x-2y = 4
x = 2y - 4 


In the second equation things don't line up, so subtract 2y from both sides to make it line up in standard form.  Rewrite the first equation as is, and rearrange the second equation so it looks like this:

5x-2y = 4
x-2y = -4


Then you can solve it accordingly.  By the way, if one of the equations is in the form x = 2y -4, you might want to try the substitution method.


R^2 at SCC