Question 759541
x - 2y = -4
2x - y = 1

Eq 1
x - 2y = -4
Add 2y to both sides.
x - 2y + 2y = -4 + 2y
         x = -4 + 2y
Eq 2
2x - y = 1
Substitute x = -4 + 2y
into Eq 2
2(-4 + 2y) - y = 1
Multiply out
-8 + 4y - y = 1
Collect like terms
Remember to change signs if you cross the =
  +4y - y = 1 + 8
       3y = 9
        y = 3
Substitute y = 3 in Eq 1
 x - 2y = -4
 x - 2(3) = -4
 x - 6 = -4
     x = -4 + 6
     x = 2
 x = 2 y = 3
Hope this helps.
:-)