Question

Find n value of (n+1)!=20(n-1)!

Answer 1

solve for n by simplifying both side of equation than isolating the variable
n=21 upon 19

Answer 2

❤❤Here is your answer ✌ ✌

$\huge {\red {\bold {Answer}}}$

n+1=20(n-1)
=>n+1=20n-20
=>n-20n=-20-1
=>-19n=-21
=>n=-21/-19

=>n=21/19✔