Hello,
To start off, if they want us to solve for "x", let's start off by adding 4y to both sides. After you simplify it, the equation is: 2x = 4y+6.
To then get "x" by itself, simply divide "x" by two to both sides. After doing that, the equation simplified is: x = 2y + 3 which is letter D.
Hope this helps!
May