-2(a-5)-10a

To simplify the expression \(-2(a - 5) - 10a\), follow these steps:

1. Distribute \(-2\) to both \(a\) and \(-5\): \[ -2a + 10 - 10a \]

2. Combine like terms: \[ -2a - 10a + 10 = -12a + 10 \]

So, the simplified expression is: \[ -12a + 10 \]