Question

If the mid point (x,y) of the line joining (3,4) and (p,7) lies on 2x+2y+1=0, then what will be the value of p?

Answer 1

as ,(x,y) is the mid point of (3,4)and(p,7) .
therefore,x=(p+3)÷2and y=(4+7)÷2
or ,y=11÷2
it is also mentioned that ,the point (x,y) lies on
2x+2y+1=0
therefore ,the value of x and y we can put on this line and by solving this we get ,p=_15