Question

find x and y in the following aps- x,13,y,3​

Answer 1

since above are in ap
y-13=3-y
2y=16
y=8
again
13-x=y-13
13-x=-5
x=18

Answer 2

Step-by-step explanation:

y-13=3-y

2y=13+3

2y=16

y=16/2

y=8.... (a³)

now,

13-x=y-13 ....(a²-a¹ = a³-a²)

13-x =8-13

x=13+5

x=18 ( a¹)

hence a¹= 18

a³= 8