Question

X+Y=20, X-Y=12
X*Y=?

Answer 1

x+y= 20

x-y=12

2x= 32

x= 16

y = 4

so x*y = 64

Answer 2

Answer:

Step-by-step explanation:

X+Y=20. -------------- (1)

X-Y=12. ---------------(2)

On adding eqn. 1 and 2,we get

2x = 32

=> x = 16

From eqn. 1

Y = 20 - 16

= 4

Now,

X*Y= 16 ×4

= 64 Ans.