$x_2=0\mathrm{.}3x_1+7\mathrm{.}3$

$x_2=0\mathrm{.}31x_1+7\mathrm{.}2$

$($a$)$ plot the two equations to find their common solution $(x_1,x_2)$

$($b$)$ Formulate these equations as a matrix problem, $Ax=b$

$($c$)$ Solve by hand for $(x_1,x_2),$ and compare your answer to what you surmise from the graph