Question

x + y =15. x - y = 3​

Answer 1

Answer:

Step-by-step explanation:

X + y =15 -----1

x - y = 3​. -----2

_______

2x=18

_______

X=18/2 =9

Substitute X=9 in equation 2

X-y=3

9-y=3

Y=6

(X,y)=(9,6)

Answer 2

Answer:

2x=18

x=9

x value put up the first equation

9+y=15

y=6