Question

give equation of two line pass through (3,10)

Answer 1

x=3,y=10
it's the equation

Answer 2

x + y = 13

3 + 10 = 13

13 = 13

y - x = 7

10 -3 = 7

7 = 7

So equations are

x + y = 13 --------------------[1]

y - x = 7 ---------------------- [2]