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

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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