Question 92107
For the first problem:
5x - 2y = -5
y - 5x = 3 
<br>
Choose one variable and isolate it.  I chose 5x because I can substitute between both equations:
y - 5x = 3
-5x = -y + 3
5x = y - 3
Then substitute into the first equation:
5x - 2y = -5
(y - 3) -2y = -5
Now solve for y:
-y - 3 = -5
-y = -2
y = 2
Once you have y, you can now solve for x by plugging into either equation:
y - 5x = 3
(2) - 5x = 3
-5x = 1
x = -1/5