Question 261576: i have a ?? i dont understand algebra that well solving for x or y or the problems 2x-y=3?? or 3x+y=5 where do these numbers comefrom
Answer by vleith(2983)   (Show Source):
You can put this solution on YOUR website! Both equations are lines. To plot the lines, pick a value for x and then find y by using the equation.
For instance, given 
Pick any x. let's pick x=0.
Now plug that value for x into the equation and solve for y
Now plot that point (0,-3)
In order to plot a line, you need two points.
So pick another x, let's say x=1
So a second point is (1,-1). Plot that point,
Now draw the line that goes through both points
Use the same process for the second equation. I am sure you can do it.
You asked, where do these numbers come from? Now you know, YOU pick them.
When you plot for second line, you'll see it intersects the first line at one point.
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