symbolicallyClaire read for "x" minutes
Ted read for 3/5 more than that. → This means that he read "x" minutes and then 3/5x more, symbolically:
[tex]y=x+\frac{3}{5}x[/tex]The term "x" is not alone, there is a hidden coefficient of 1 multiplying it
[tex]y=1x+\frac{3}{5}x[/tex]To simplify the expression you have to add both coefficients
[tex]\begin{gathered} y=(1+\frac{3}{5})x \\ y=\frac{8}{5}x \end{gathered}[/tex]The fraction 8/5 expressed as a decimal value is 1.6, then the equation that relates the minutes that Claire and Ted read is
[tex]y=1.6x[/tex]