Use opposite operation to the side that has the variable, which in this case will be 1.9.
We will use division for this.
Divide the side that has the variable to get the variable by itself.
Now do the same on the other side.
Which means that we'll divide 1.9 from 1.9 to isolate the variable.
Then we'll do the same on the other side; divide 1.9 from 11.4