Question

find the value of the expression $5 + 19 - n + 4 + m$ for $m = 1$ and $n = 9$.

Explanation:

Step1: Substitute given values

$5 + 19 - 9 + 4 + 1$

Step2: Calculate constant terms left to right

$24 - 9 + 4 + 1$

Step3: Continue simplifying

$15 + 4 + 1$

Step4: Final addition

$19 + 1$

Answer:

20