How do you solve #5/4=10/x#?

Question

5327 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-06-24T13:41:41

#x=8#

As #5/4=10/x#, we have

#5/4xx4=10/x xx4#

or #5/cancel4^1xxcancel4^1=40/x#

or #5xx x=40/x xx x#

or #5xx x=40/cancelx xx cancelx#

or #5x=40#

or #5x xx 1/5=40xx1/5#

or #cancel5x xx 1/cancel5=cancel40^8xx1/cancel5^1#

or #x=8#

Answer 2 · 2017-06-25T00:46:24

#x=8#

A different approach is to cross multiply:

#5x=40#

#x=40/5#

#x=8#

Answer 3 · 2017-06-25T15:51:03

Cross multiplying is the easiest.
#5*x =10*4#
#5x=40#
#x=40/5#
#x=8#

Answer 4 · 2017-06-26T05:09:35

Simply by doing cross multiplication, we get #x=8#.

#5/4=10/x#

#5x=40#

#x=40/5#

#x=8#