ovoxoxovocovockdnnes
ovoxoxovocovockdnnes ovoxoxovocovockdnnes
  • 19-05-2016
  • Mathematics
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mecca99
mecca99 mecca99
  • 19-05-2016
1) 3/5=9/x (cross multiply)
3x=5(9)
3x=45
x=15

2) 
2/4=x/12   (cross multiply)
 2(12)=4x
     24=4x
       6=x

3) 10/x=5/9   (cross multiply)
   10(9)=5x
       90=5x
       18=x

4) 5/6=x/18
5(18)=6x
90=6x
x=15
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