marselah3 marselah3
  • 19-05-2016
  • Mathematics
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combine like terms: x +x - x + y + y + y - z + z - z

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Аноним Аноним
  • 19-05-2016
x  + x - x is   x
y + y + y is   3y
-z + z - z is   -z
x + 3y 
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