12:67=х•3

To solve the equation \( 12:67 = x \cdot 3 \), you can rewrite it in fraction form:

\[ \frac{12}{67} = x \cdot 3 \]

To isolate \( x \), divide both sides by 3:

\[ x = \frac{12}{67 \cdot 3} \]

Now calculate \( 67 \cdot 3 \):

\[ 67 \cdot 3 = 201 \]

So now the equation becomes:

\[ x = \frac{12}{201} \]

This fraction can be simplified. The greatest common divisor (GCD) of 12 and 201 is 3. So, dividing the numerator and the denominator by 3:

\[ x = \frac{12 \div 3}{201 \div 3} = \frac{4}{67} \]

Thus, the value of \( x \) is:

\[ x = \frac{4}{67} \]