I'd love to help, unfortunately the first statement is not an equation.
If you meant 3x + 4y = 2x + 3y , the equation represents a line.
I can tell that by seeing that both x and y are multiplied to the first power, in other words there are no terms where either x or y are multiplied by themself any number of times, nor does either variable appear in the denominator of a fraction.
You can simplify it as far as converting it to the form y = mx + b, but without further information you cannot solve to find a specific point on the line.
Let's do that:
Gather x's to the right side and y's to the left side so that we'll end up with y = mx + b.
X's can be moved from the left side to the right side by subtracting 3x from each side.
4y = 3y - x
Next, we can remove all of the y's from the right side by subtracting 3y from both sides:
y = - x
By comparing this result to form y = mx + b, I can see that the slope, m, has a value of -1. The y-intercept, b, has a value of zero. Therefore, the equation would be represented graphically by a line going through the origin with slope -1 (going down as you travel along the line to the right at an angle of -45 degrees, or 45 degrees clockwise from horizontal.
The second equation has only one variable, x, and we can solve the equation to find out at what value of x the equation is true.
x + 40 = 2x - 20.
Let's get rid of the x on the left by subtracting x from both sides.
40 = x - 20
Let's get x by itself by getting rid of the -20. To cancel subtract 20 from x, we add 20 to both sides.
40 + 20 = x - 20 + 20
60 = x
or in other words
x = 60
This a solution of the second equation. Graphically, it represents a vertical line at x = 60.