Q is the midpint of PR. If PQ= 3x and QR=x+4, what is PQ?

Question

Q is the midpoint of PR .

If PQ = 3x
and QR = x + 4
, what is PQ?

Answer 1

It is ALWAYS helpful to sketch the appropriate figure.

That will make clear that 3x = x+4, by the definition of midpoint.

Then you solve the equation and you get x=2, so that PQ = 6.