* \( 5 x-4=21 \)

To solve the equation \( 5x - 4 = 21 \), the first step is to add 4 to both sides to isolate the term with \( x \). This gives us \( 5x = 25 \). Now, divide by 5 to find the value of \( x \). So, \( x = 5 \)! It’s like finding the last piece of a puzzle that completes the picture! Many learners forget to perform operations on both sides of the equation, which can lead to incorrect answers. Remember, balance is key in equations! Also, double-check your arithmetic; little mistakes can make big differences in the final answer. Practice makes perfect!