The area \( A \) of a rectangle is calculated using the formula:
\[ A = \text{length} \times \text{width} \]
In this case, the length is \( x \) cm and the width is \( 7 \) cm. According to your question, the area is given as \( 56 \) cm². We can set up the equation:
\[ A = x \times 7 = 56 \]
To find the value of \( x \), we can rearrange the equation:
\[ x \times 7 = 56 \]
Now, divide both sides by \( 7 \):
\[ x = \frac{56}{7} \] \[ x = 8 \]
So, the length of the rectangle is \( 8 \) cm.