You can 
put this solution on YOUR website! .
Left sides are identical --- hence, right side are equal.
It gives you an equation in one single unknown x
    4x - 2 = -2x + 4
Simplify and find x
    4x + 2x = 4 + 2
       6x   =   6
        x    = 6/6 = 1.
The from first given equation 
    y = 4*1 - 2 = 2.
Answer.  x= 1;  y= 2.
Solved.
MEMORIZE this mantra:  it is the shortest way to get the solution/(the answer).