Solve for x (x+4)/(6x)=1/x

Finding the LCD of a list of values is the same as finding the LCM of the denominators of those values.

Since ${\displaystyle 6x,x}$ contain both numbers and variables, there are two steps to find the LCM. Find LCM for the numeric part ${\displaystyle 6,1}$ then find LCM for the variable part ${\displaystyle x^1,x^1}$.

The LCM is the smallest positive number that all of the numbers divide into evenly.

${\displaystyle 6}$ has factors of ${\displaystyle 2}$ and ${\displaystyle 3}$.

The number ${\displaystyle 1}$ is not a prime number because it only has one positive factor, which is itself.

The LCM of ${\displaystyle 6,1}$ is the result of multiplying all prime factors the greatest number of times they occur in either number.

Multiply ${\displaystyle 2}$ by ${\displaystyle 3}$.

The factor for ${\displaystyle x^1}$ is ${\displaystyle x}$ itself.

The LCM of ${\displaystyle x^1,x^1}$ is the result of multiplying all prime factors the greatest number of times they occur in either term.

The LCM for ${\displaystyle 6x,x}$ is the numeric part ${\displaystyle 6}$ multiplied by the variable part.

Multiply each term in ${\displaystyle \frac{x+4}{6x}=\frac{1}{x}}$ by ${\displaystyle 6x}$.

Simplify the left side.

Simplify the right side.

Subtract ${\displaystyle 4}$ from both sides of the equation.

Subtract ${\displaystyle 4}$ from ${\displaystyle 6}$.