Find the solution (feasible) of following inequations
x+ 4y ≤ 24;
3x +y ≤21 ;
x+ y ≤9;
x≥0 and y≥0
It is a Mansard-roof-shaped region in the 1st quadrant.
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solve x+ 4y ≤ 24; 3x +y ≤21 ; x+ y ≤9; x≥0 and y≥0