1. x+5y =5
subtract x from each side
5y = -x+5
divide by 5
y = -1/5 x +1
2. 3x + 2y =4
subtract 3x from each side
2y = -3x +4
divide by 2
y = -3/2 x +2
3. 2x+y =4
subtract 2x from each side
y = -2x +4
4. 4x-2y = 6
subtract 4x from each side
-2y = -4x +6
divide by -2
y = 2x -3