Question

find the value of p if x=-p,y=3 i a solution of 2x+9y-13=0

Answer 1

Solution is attached below

Answer 2

x= -p
y= 3
2x+9y-13=0
-2p + 27 - 13=0
-2p +14=0
-2p=-14
2p=14
p=7