Question

x + y = 12 ; x - y =10​

Answer 1

solution

x + y = 12

x = - y + 12

- y + 12 - y = 10

- 2y + 12 = 10

- 2y = - 2

y = 1

x = - 1 + 12

x = 11

x = 11 , y = 1

Answer 2

Answer:

x=11 ; y=1

Step-by-step explanation:

x+y=12. _____(i)

x-y=10. _____(ii)

______

2x=22

x=22/2

x=11

put x=11 in equation (i)

x+y=12

11+y=12

y=12-11

y=1

x=11 ; y=1