Question

If |x| + |y| = 7, then what is the sum of minimum and maximum values of x + y?

Answer 1

Step-by-step explanation:

x + y=7

x= 7 - y ---------i

put value of x in x + y=7

7-y+y=7

0=0

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Answer 2

Answer:

$x+y=0.$

Step-by-step explanation:

The minimum value of $x+y$ will be attained, when both are negative.

So minimum of $x+y=-7$.

The maximum value of $x+y$ will be attained, when both are positive.

So maximum of $x+y=7$.

Then max of $(x+y)$ and min of $(x+y)=7+(-7)=0.$