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hey106 hey106
  • 03-09-2016
  • Mathematics
Answered

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

Verified Answer :

GodricSalvatore
GodricSalvatore GodricSalvatore
  • 03-09-2016

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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