Question 27243
Whitney
you have two equations:
y = 3x
2x + y = 5
We know what y is right? It is 3x.  So we can plug in 3x for y:
2x + (3x) = 5  Now we add 2x + 3x
5x = 5  Now we divide both sides by 5
 x = 1
Now we plug x into y = 3x to solve for y
y = 3(1)
y = 3
So x = 1 and y = 3
Hope this helped :)
Remember whenever you have two variables (x and y) you need two equations to solve for it