harley6 harley6
  • 24-02-2016
  • Mathematics
contestada

when 20 is reduced by two thirds of a number the result is 12 what is the number

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sofia448119 sofia448119
  • 24-02-2016
The number is 12, if you split it into 3 parts you get 4 so 2/3 of it would be 8. then you just take 20 ans subtract 8 to get 12.
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Okalukato
Okalukato Okalukato
  • 24-02-2016
The equation would be something like
20 - 2/3x = 12

so times it by 3 to get rid of the demoninator

60 - 2x = 36

rearrange

-2x = 36 - 60

solve

-2x = -24

so

x = 12
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