Question

$0.05n+0.10(n+7)=3.55$

Short answer

The value of$n=19$

Step-by-step solution

- The given information

$0.05n+0.10(n+7)=3.55$

Step 2

$$\begin{gathered} 0.05n+0.10(n+7)=3.55 \\ \Rightarrow 0.05n+0.10n+0.70=3.55 \\ \Rightarrow 0.15n=3.55-0.70 \\ \Rightarrow 0.15n=2.85 \\ \Rightarrow n=19 \end{gathered}$$