sofiabarahona sofiabarahona
  • 20-12-2017
  • Mathematics
contestada

the difference of 3 times a number and 18 is 39. what is the number?

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aidenh101
aidenh101 aidenh101
  • 20-12-2017
The number is 7(Seven).
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StellarStephanie
StellarStephanie StellarStephanie
  • 20-12-2017
Just set up an equation, with "x" being the unknown number.
3x-18=39
3x=57
x=19.
The unknown number is 19.
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