Answer:
Step 2.
Explanation:
Jamie tried to solve the equation.
[tex]\frac{2}{5}n+7=12[/tex]
Step 1: Subtract 7 from both sides:
[tex]\begin{gathered} \frac{2}{5}n+7-7=12-7 \\ \frac{2}{5}n=5 \end{gathered}[/tex]
Jamie's Step 1 was correct.
Step 2: Multiply both sides by 5
[tex]\begin{gathered} \frac{2}{5}n\times5=5\times5 \\ 2n=25 \\ n=\frac{25}{2} \end{gathered}[/tex]
Observe that this is different from what Jamie has. Therefore, Jamie's mistake was in Step 2.
