Question:
When 9 is subtracted from the product of p and 4, the result is 11. The value of p is—-.
Solution:
5
Given, 9 is subtracted from the product of $p$ and $4 .$
Then, $4 p-9=11$
$\Rightarrow \quad 4 p=11+9 \quad$ [transposing $-9$ to RHS]
$\Rightarrow \quad 4 p=20$
$\Rightarrow \quad \quad \frac{4 p}{4}=\frac{20}{4} \quad \quad$ [dividing both sides by 4$]$
$\therefore \quad p=5$
Hence, the value of $p$ is 5 .