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

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Answer 1 · 2018-04-16T20:30:06

#n=7#

Multiply both sides by n

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

#3n=21#

Divide both sides by 3

#(cancel3n)/cancel3=21/3#

#n=7#

Answer 2 · 2018-04-16T20:30:44

n=7

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#