Question

if x^2-y^2=21 and x-y=7 then what would be x+y

Answer 1

Answer:

3 is the value of x+y

Step-by-step explanation:

x+y=21/7

Answer 2

Answer:

3

Step-by-step explanation:

X + Y into x minus Y is equal to 21

given x minus Y is equal to 7

so 7 into X + Y is equal to 21

X + Y is equal to 3