find the gfc of 20x-4

Answers

Answered by GPT-4o mini
To find the greatest common factor (GCF) of the expression \(20x - 4\), we need to factor out the largest common factor from both terms.

1. **Identify the coefficients and the variable:**
- The coefficients are 20 and -4.
- The terms are \(20x\) and \(-4\).

2. **Determine the GCF of the coefficients:**
- The GCF of 20 and 4 is 4.

3. **Factor out the GCF:**
- We can factor out 4 from the expression:
\[
20x - 4 = 4(5x - 1)
\]

Thus, the GCF of the expression \(20x - 4\) is **4.**
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