You need to do a lot of distributing.
First, distribute the 1.6 and 4.8. Then, distribute the negative sign on the left hand side.
Now, it should be simple algebra.
Edit: By distribute you basically multiply 1.6 to x and 3.8 as well. So, you have 1.6x and also 1.6*3.8 but you preserve the addition so it's 1.6x + (1.6*3.8).
Same for 4.8(x + 1.4) --> 4.8*x + (4.8*1.4).