x=-1
First, you need to factor out the 3 from the 4x/3,
4x=3(x-1/3)
Next, distribute the 3 to the (x-1/3), this will leave you with,
4x= 3x-1
Then, you need to subtract the 3x from the 4x, given these are like-terms…
x=-1
If you want to double-check this, you can plug x=-1 into the following expression and you will see that the solution is true…
I hope this helps