elenismartinez elenismartinez
  • 20-08-2015
  • Mathematics
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when i double me number and add ten.i get my number plus nine

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eu99li
eu99li eu99li
  • 20-08-2015
x is your number...... 2x+10=x+9 . . . . /-x. ......... x+10=9 . . . . . /-10......... x=-1
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