6:7=х:0,7

To solve the proportion \( \frac{6}{7} = \frac{x}{0.7} \), you can use cross-multiplication.

Cross-multiplying gives you:

\[ 6 \cdot 0.7 = 7 \cdot x \]

Calculating the left side:

\[ 6 \cdot 0.7 = 4.2 \]

Now, set up the equation:

\[ 4.2 = 7x \]

To find \( x \), divide both sides by 7:

\[ x = \frac{4.2}{7} \]

Calculating this:

\[ x = 0.6 \]

So, the value of \( x \) is \( 0.6 \).