Question

The steps below show the incomplete solution to find the value of x for the equation

Answer 1

In the step 3 you can add 5 on both sides so you gonna have : 
4x-5 = 15 
    +5   +5  ⇒  4x = 20 so thats the next step :))
i hope this be helpful 
have a nice they 

Answer 2

The next step should be 4x=20~