To determine which of the given options is an equation with one constant, two coefficients, and three terms, let's analyze both equations.
1. **3x - 4 = 5y**
- This can be rearranged to: \(3x - 5y - 4 = 0\).
- It has three terms: \(3x\), \(-5y\), and \(-4\).
- Coefficients: \(3\) (for \(x\)) and \(-5\) (for \(y\)).
- Constant: \(-4\).
2. **3x - 4y = 5x**
- This can be rearranged to: \(3x - 5x - 4y = 0\) or \(-2x - 4y = 0\).
- It has three terms when written in standard form as: \(-2x\), \(-4y\), and \(0\).
- Coefficients: \(-2\) (for \(x\)) and \(-4\) (for \(y\)).
- There is no constant term other than \(0\) here.
From this analysis, the first equation **3x - 4 = 5y** contains one constant (\(-4\)), two coefficients (\(3\) and \(-5\)), and meets the requirement of three terms.
Therefore, the answer is:
**3x - 4 = 5y**.