Given that -3 <= 7x + 2y <= 3 and -4 <= y - x <= 4, what is the maximum possible value of x + y?
graph the lines using = signs
then look at corners
It looks to me like x+y is max on y axis and is 4+3/2 = 5.5
then look at corners
It looks to me like x+y is max on y axis and is 4+3/2 = 5.5