You can put this solution on YOUR website! As stated, you are asking for values of x and y that make the equation true. There are an uncountable number of such pairs of numbers. For example, if x=0 then y=-3. Or if y=0 then x=6/4. Pick any value for x and you can solve for the value of y. [Example: x=2.17, then y = 1.34]
To get y in terms of x would give
y = 2x -3.
Perhaps this is what you want. This is the equation of a line with slope of 2 that crosses the y-axis at -3.
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