Question 366469
{{{graph(300,300,-100,100,-100,100,(340-3x)/5)}}}
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*[invoke plot_any_inequality "3x+5y<=340", -100, 100, -100, 100, 300, 300]
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*[invoke plot_any_inequality "x>=30", -10, 40, -10, 10, 300, 300]
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*[invoke plot_any_inequality "y>=20", -10, 10, -10, 50, 300, 300]