Question

If PQ = x – 5, QR = 2x – 1, and PR = 21, find x. x =

Answer 1

We know PQ+QR=PR

So, $(x-5)+(2x-1)=21$

$So, 3x-6=21$

So $3x=21+6=27$

So $x=\frac {27} {3} =9$ (Ans.)