Question

if X + Y equal to 7 and x minus Y is equal to 3 evaluate xy​

Answer 1

Answer:

10

Step-by-step explanation:

x+y=7

x-y=3

now both are adding

2x=10

x=10/2

x=5

x+y=7

5+y=7

y=7-5

y=2

xy=5×2

xy=10

Answer 2

Answer:

10

Step-by-step explanation:

X+Y=7________1

X-Y=3_________2

now 1+2

X+Y+X-Y=7+3

2X=10

X=5

Here X+Y=7

5+Y=7

Y=2

Therefore XY=5×2

XY=10