Question 800112
p-3=q-p=24-q

because the common difference is the same in an AP

p-3=q-p

2p=3+q

p=(3+q)/2

q-p=24-q

q-(3+q)/2 =24-q

2q-(3+q)/2 =24

3q-3 = 24*2

3q=51
q=17

so p=10