4y - x = 10

To solve for x, you can rearrange the equation 4y - x = 10 and isolate x by moving the x term to the other side of the equation:

4y - x + x = 10 + x

Simplifying, we get:

4y = x + 10

Now, let's isolate x:

x = 4y - 10

So the solution for x is x = 4y - 10.