SAT Question d0a2fed5: Linear Equations In One Variable answer and explanation with Desmos solution

Subtracting $18$ from each side of the given equation yields $\frac{6}{7}p=36$. Multiplying each side of this equation by $\frac{7}{6}$ yields $p=42$. Multiplying each side of this equation by $7$ yields $7p=294$. Therefore, the value of $7p$ is $294$.