Let's simplify them top to bottom.
6(x + 2) < x - 3
6x + 12 < x - 3
5x + 12 < -3
5x < -15
x < -3
This one checks out.
3 + 4x <= 2(1 + 2x)
4x + 3 <= 4x + 2
This is a problem. In no world is 4x + 3 ever less than or equal to 4x + 2. This one has no solution.
Answer:
Step-by-step explanation:
Given
Economic system Q is given by

also 
if 



substitute these values




differentiate w.r.t to L to get 



The answer for your question is (x,y)=(4,9)
Answer:
$13.50 (discount price)
$1.50 (discount amount)
Step-by-step explanation:
$15 x 10% =
$15 x 0.1 = $1.50
$15 - $1.50 = $13.50