Given:
Leo had $91, which is 7 times as much money as Alison had.
Let x represents Alison's money.
So, the expression for Leo's money is,
[tex]7x=91[/tex]Divide both sides of the above equation by 7.
[tex]\begin{gathered} \frac{7x}{7}=\frac{91}{7} \\ x=13 \end{gathered}[/tex]So, Alison had $13.
Therefore, the correct solution method is
A) 7x = 91. Divide both sides by 7. Alison had $13.