Answers

2016-03-09T18:07:17+08:00
-1(4x-6y=16)
3x-6y=9

-4x+6y=-16
3x-6y=9

-1(-x=-7)
x=7


3(7)=6y+9
21=6y+9
-6y=-21+9
-6/-6=-12/-6
y=12

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