Use a calculator solve the system
{9x6y=875x5y=47.5\displaystyle {\left\lbrace\begin{array}{c} {9}{x}-{6}{y}={87}\\{5}{x}-{5}{y}={47.5}\end{array}\right.}

Your answer is
x=\displaystyle {x}=  
y=\displaystyle {y}=