4x-5/7 - 2x+1/2 = 1/2 - x ans

First we simplify like terms:

4x-2x+1/2-5/7=1/2-x

2x-3/14=1/2-x

Then you add x to both sides to get everything with the variables together.

3x-3/14=1/2

Finally, you add 3/14 to both sides for the same reason.

3x=10/14 (simplifies to 5/7)

Then we divide by 3 to get x alone.

x=5/21