To represent the situation where the value of \( x \) is decreased by 43%, you can start by calculating how much of \( x \) remains after the decrease.
- A decrease of 43% means that you are left with 100% - 43% = 57% of \( x \).
- To express 57% as a decimal, you convert it: \( 57% = 0.57 \).
Therefore, the expression that represents the value of \( x \) after it has been decreased by 43% is:
\[ 0.57x \]
So, the expression you're looking for is \( 0.57x \).