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 \( 0.6 \).