please help , giving brainliest and a thanks ,(right answers only) scammers get reported. (worth 20 points)

Answer:
The work is shown below; y=3
Step-by-step explanation:
[tex]4.5=1.5y\\\frac{4.5}{1.5} =\frac{1.5y}{1.5} \\3=y[/tex]