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OpenStudy (anonymous):
3/4=9/x I need to know how to solve this not just the answer please.
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OpenStudy (anonymous):
Cross-multiply and divide by 3
OpenStudy (phi):
you can cross multiply?
OpenStudy (cwrw238):
find lcd then multiply through b this to eliminate the fractions then solve f or x
OpenStudy (anonymous):
I did the cross multiplying. 3*x=3x & 4*9=36 That gave me 3x=36 Then i did 3x/3= x & 36/3= 12 so i got x=12 Is that right?
OpenStudy (cwrw238):
dead right
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OpenStudy (anonymous):
YAY!! THX!!!!
OpenStudy (cwrw238):
cross multiplying works when you have 1 or 2 fractions - if there are more than 2 fractions the method i mentioned can be used
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