Question

x + Y = 5 and x- Y = 8​

Answer 1

Step-by-step explanation:

x+y=5

x=5-y......(1)

now

x-y=8

putting the value of x from equation (1)

5-y-y=7

5-2y=7

-2y=7-5

-2y=2

_y=2

y= -2

x=5-(-2)=5+2=7

Answer 2

Answer:

x + y = 5 -------- (1)

x - y = 8 --------- (2)

Adding eq 1 and 2

x + y = 5

x - y = 8

-------------------

2x = 13

x = 13/2 = 6.5

putti' value of x in eq 1

6.5 + y = 5

y = 5 - 6.5

y = -1.5