List of top Mathematics for Economy Questions on Linear Programming Problem

The optimal value of the linear programming problem
Maximise $z = 2x + 3y$
subject to
$5x + 4y ≤ 20,$
$ 3𝑥 + 5𝑦 ≤ 15,$
$ 2𝑥 + 𝑦 ≤ 4,$
$ 𝑥, 𝑦 ≥ 0,$
is