Let the cost if 1 shrub = x
The cost of some potting soil for $12.50 and 6 shrubs = $71.00
so,
[tex]6\cdot x+12.5=71[/tex]solve for x
subtract 12.5 from both sides
[tex]\begin{gathered} 6\cdot x+12.5-12.5=71-12.5 \\ 6\cdot x=58.5 \end{gathered}[/tex]Divide both sides by 6
[tex]\begin{gathered} \frac{6x}{6}=\frac{58.5}{6} \\ \\ x=9.75 \end{gathered}[/tex]So, the cost of 1 shrub = $9.75