Question

find the value of a, for which point P(a/3,2) is the mid point of the line segment joining the points Q(-5,4) and R(-1,0).​

Answer 1

if p is the mid point the ratio will be 1:1

x=x1 + x2 / 2

a= -5-1/2

a= -6/2

a= -3

Answer 2

As it is given point P is midpoint you could use the section formula and take ratio as 1:1