How do you solve #frac{6}{2} = \frac{21}{n}#?

2 Answers
Apr 16, 2018

#n=7#

Explanation:

Multiply both sides by n

#n*6/2=canceln*21/canceln#

#3n=21#

Divide both sides by 3

#(cancel3n)/cancel3=21/3#

#n=7#

Apr 16, 2018

n=7

Explanation:

Just cross multiply
When you have two fractions like that across from each other you multiply diagonally so #6*n# and #2*21#
#6n=42#
#n=7#