Question

3n - 6mn - 12n 15.5 + 5mn - 11m

Explanation:

Step1: Combine like terms for mn terms

We have \(-6mn + 5mn\). Combining these, we get \((-6 + 5)mn=-mn\).

Step2: Combine like terms for m terms

We have \(3m-11m\). Combining these, we get \((3 - 11)m=-8m\).

Step3: Combine the constant term

The constant term is \(15.5\). Now, putting it all together: \(15.5 - 8m - mn\) (or \(15.5 - mn - 8m\)). Wait, maybe the original expression is \(3m - 6mn + 15.5+5mn - 11m\)? Let's re - arrange the terms:
Group the \(m\) terms: \(3m-11m\), group the \(mn\) terms: \(-6mn + 5mn\), and the constant term \(15.5\).
For \(m\) terms: \(3m-11m=(3 - 11)m=-8m\)
For \(mn\) terms: \(-6mn+5mn=(-6 + 5)mn=-mn\)
Then the simplified expression is \(15.5-8m - mn\) (or \(15.5 - mn-8m\)). If we assume the original problem is to simplify \(3m - 6mn+15.5 + 5mn-11m\):

Step1: Rearrange terms

\(3m-11m-6mn + 5mn+15.5\)

Step2: Combine \(m\) terms

\(3m-11m=(3 - 11)m=-8m\)

Step3: Combine \(mn\) terms

\(-6mn + 5mn=(-6 + 5)mn=-mn\)

Step4: Combine all terms

The simplified expression is \(15.5-8m - mn\) (or \(-8m - mn+15.5\))

Answer:

If the problem is to simplify \(3m - 6mn + 15.5+5mn - 11m\), the answer is \(15.5-8m - mn\) (or equivalent forms like \(-8m - mn + 15.5\))