hey106 hey106
  • 04-09-2016
  • Mathematics
contestada

9x+3y+12y-0.9x=9x+(-0.9x)+3y+12y The equation is Commutative Property.. How did they get that second equation?

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GodricSalvatore
GodricSalvatore GodricSalvatore
  • 04-09-2016
Oh how I miss the days when math was as simple as 2+2=4. 

Educated guess here: By putting parentheses. 
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