Solve the following math problem efficiently and clearly:

- For simple problems (2 steps or fewer):
Provide a concise solution with minimal explanation.

- For complex problems (3 steps or more):
Use this step-by-step format:

## Step 1: [Concise description]
[Brief explanation and calculations]

## Step 2: [Concise description]
[Brief explanation and calculations]

...

Regardless of the approach, always conclude with:

Therefore, the final answer is: $oxed{answer}$. I hope it is correct.

Where [answer] is just the final number or expression that solves the problem.

Problem: In the diagram, $P$ is on $RS$ so that $QP$ bisects $\angle SQR$.  Also, $PQ=PR$, $\angle RSQ=2y^\circ$, and $\angle RPQ=3y^\circ$.  What is the measure, in degrees, of $\angle RPQ$? [asy]
// C14
import olympiad;
size(7cm);

real x = 50; real y = 20;

pair q = (1, 0);
pair r = (0, 0);
pair p = intersectionpoints((10 * dir(x))--r, q--(shift(q) * 10 * dir(180 - x)))[0];
pair s = intersectionpoints(r--(r + 10 * (p - r)), 10 * dir(180 - 2 * x)--q)[0];

// Draw lines
draw(p--s--q--p--r--q);

// Label points
label("$R$", r, SW);
label("$Q$", q, SE);
label("$S$", s, N);
label("$P$", p, NW);

// Label angles
label("$x^\circ$", q, 2 * W + 2 * NW);
label("$x^\circ$", q, 4 * N + 2 * NW);
label("$2y^\circ$", s, 5 * S + 4 * SW);
label("$3y^\circ$", p, 4 * S);

// Tick marks
add(pathticks(r--p, 2, spacing=0.6, s=2));
add(pathticks(p--q, 2, spacing=0.6, s=2));
[/asy]
user