If PQR ~ SQT, find the value of x

x = 15

Step-by-step explanation:

First you add P and Q together which equals x+13

Then divide x+13 and 8 and make it equal to 21/x-9

x should then equal 15

x+13/9 = 21/x-9

x^2+4x−117=168

x^2+4x−285=0

(x−15)(x+19)=0

x=15

it cannot be a negative number so x cannot be -19

8

step-by-step explanation: