\[
\begin{aligned}
x & \geq 1000 \\
y & \geq 600 \\
x+y & \leq 2800
\end{aligned}
\]
{"axisType": 3, "coordSystem": {"xmin": 0, "xmax": 3000, "ymin": 0, "ymax": 3000}, "commands": ["x = 1000", "y = 600", "y = 2800 - x"], "latex_expressions": ["$x \\geq 1000$", "$y \\geq 600$", "$x + y \\leq 2800$"]}