Can somebody help solve it?

Step-by-step explanation:

It's an isosceles triangle so it means two sides are equal or better term congruent .

So PR is equal to PQ

You can write

X+1=2x+1

Solve the equation

2x+1-x-1=0

X=0

In order to find PQ plug X in place of 2x+1

To find

QR do the same for its expression .

828. all there is to it!

here, if you ever need with rounding (or other forms of arithmetic/math) again, use this:

thats the rounding one, but if you just click the top left, it shows you all the calculators you may need!