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Wed Apr $17$$\newline$AA$\newline$zearn.org$\newline$C$\newline$Log in to$\newline$SSO Launch...$\newline$Math | Top-r...$\newline$Math | Top-r... Z Zearn$\newline$Zearn$\newline$Log in to i-R...$\newline$M$4$|L$11$$\newline$On Both of the Lines$\newline$Sign$\newline$Erica and Jared are tracking the number of kilometers they bike. Erica had already biked $8 \mathrm{~km}$, anc continued biking $4 \mathrm{~km}$ per day. Jared had already biked $2 \mathrm{~km}$, and continued biking $6 \mathrm{~km}$ per day. ($4$)$\newline$Write an equation that represents $y$, the total number of kilometers Erica has biked after $x$ days.$\newline$$1$$\newline$$2$$\newline$$3$