How do you solve for y: 2x – 4y < 12?

1 Answer
Apr 9, 2015

The result is y > x/2-3.

The procedure is the following:
First, you can divide both member of the inequality by 2, thus obtaining: x-2y < 6
Then, you proceed to isolate the "y":
x-2y < 6 => x < 2y+6 => 2y > x-6 => y > x/2-3

Graphically you can visualize the set of solutions as the zone of the plane located over the line y=x/2-3:

graph{x/2-3 [-40, 40, -20, 20]}