Answer:
[tex]x=4\ units\\QR=15\ units[/tex]
Step-by-step explanation:
Rectangles
It's a geometric shape with 4 straight sides with all interior angles of 90° and opposite sides parallel and of equal lengths. The given shape shows a rectagle whose opposite sides must be eaual, thus
[tex]-1+4x=3x+3[/tex]
Rearranging
[tex]4x-3x=3+1[/tex]
[tex]\boxed{x=4\ units}[/tex]
The measure of QR is
-1+4x which is the same as 3x+3, thus
[tex]QR=3x+3=3(4)+3=15\ units[/tex]
[tex]\boxed{QR=15\ units}[/tex]
