To solve the equation 8x + 2x = 25x4, we need to simplify both sides of the equation.

On the left side, we can combine like terms by adding the coefficients of x:

8x + 2x = (8 + 2)x = 10x

So, the equation becomes 10x = 25x4.

To solve for x, we can divide both sides of the equation by 10:

10x/10 = (25x4)/10

Simplifying further:

x = (25x4)/10

x = 100x/10

x = 10x

Now, we can divide both sides of the equation by x:

x/x = (10x)/x

1 = 10

Since 1 is not equal to 10, there is no solution to the equation 8x + 2x = 25x4.