5ах - bx + by - 5ay

To simplify the expression \(5ax - bx + by - 5ay\), we can group the terms involving \(x\) and \(y\):

1. Group the \(x\) terms: \[ (5a - b)x \]

2. Group the \(y\) terms: \[ (b - 5a)y \]

Putting these groups together, we have: \[ (5a - b)x + (b - 5a)y \]

Thus, the simplified form of the expression \(5ax - bx + by - 5ay\) is: \[ (5a - b)x + (b - 5a)y \]

This is the most simplified form of the expression. If you need any further assistance or clarification, feel free to ask!