[tex]y\cdot \:2\frac{1}{2} =[/tex] [tex]2\frac{1}{2}=\frac{2\cdot 2+1}{2}=\frac{5}{2}[/tex] [tex]=\frac{5y}{2}[/tex]
a) [tex]2y+\frac{1}{2}=\frac{4y+1}{2}[/tex]
b) [tex]2y+\frac{1}{2}y=\frac{5y}{2}[/tex]
So b) is the expression that is equivallent.
Hope I helped you!
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