Answer:
Okay, so the picture is a different question than the text.
The answer to the picture is:
67
The answer to the text is:
79
Step-by-step explanation:
I'll explain the picture one.
The line PQR can be represented as [tex]PQ + QR=PR[/tex]. Since we already know the measure of QR and PR, we can substitute inside the equation to try and find PQ.
[tex]PQ + 21 = 88[/tex]
Our goal is to isolate PQ on one side.
To do this we can subtract 21 from both sides.
[tex]PQ + 21 - 21 = 88-21\\\\PQ=67[/tex]
Hope this helped!
