Here we begin by multiplying both sides by 4 in order get an equivalent equation without fractions.
Now, we could either distribute 3 to the terms in the parentheses or divide both sides with 3. Since 48 is divisible by 3 we'll choose the latter.
To solve the equation we need to perform two inverse operations. First, we'll subtract 4 from both sides and then multiply by 2x. Note that since x is in the denominator, a solution that makes the denominator equal to 0 is not valid.