Retrieval Practice: 11h unit 20

Toby is a plumber.
He starts a job at 12 pm and finishes the job at 3 pm For this job, Toby charges £70 for every hour it takes him to complete this job plus £50 for the materials he uses. Work out how much Toby charges for this job.

$\begin{array}{|ccccc|}\hline 1& 2& 3& 4& 5\\ 0.05& \mathrm{x}& 0.2& 0.1& \mathrm{x}\\ \hline\end{array}$

$\begin{array}{c}2x+5y=12\\ 2x-2y=-2\end{array}$