The variable used in the equation 2p + 8 = 18 is _________.
The variable used in the equation 2p + 8 = 18 is p.
Step 1: Understand the equation.
We have the equation:
\(2p + 8 = 18\)
Step 2: What is a variable?
A variable is a letter that stands for an unknown number.
Step 3: Look at the parts of the equation.
The numbers \(2\), \(8\), and \(18\) are fixed numbers (constants).
The letter \(p\) is not a fixed number. It can change.
Step 4: Read \(2p\) correctly.
\(2p\) means:
\(2 \times p\)
Step 5: Identify the variable.
The letter that can vary (change) in the equation is:
\(p\)
Conclusion:
The variable used in the equation \(2p + 8 = 18\) is \(p\).