Respuesta :

gmany
The perimeter:
[tex]P=2\cdot(3x+3)+2\cdot2x=6x+6+4x=10x+6\\\\P=146\ units\to10x+6=146\ \ \ |-6\\\\10x=140\ \ \ |:10\\\\x=14\ units[/tex]
The length of the longer side:
[tex]3x+3=3\cdot14+3=42+3=45\ units[/tex]