finish the equation

1.6+4x=8

It is finished. Do you mean solve the equation for x?

subtract six from each side;
divide each side by four.

i do not understand fraction where there is a line underneath them

To finish the equation 1.6 + 4x = 8, the goal is to isolate the variable x on one side of the equation.

Here are the steps to solve it:

Step 1: Subtract 1.6 from both sides of the equation:
1.6 + 4x - 1.6 = 8 - 1.6

Simplifying, we get:
4x = 6.4

Step 2: Divide both sides of the equation by 4:
4x/4 = 6.4/4

Simplifying:
x = 1.6

So the solution to the equation 1.6 + 4x = 8 is x = 1.6.