ggiseeeelleeee ggiseeeelleeee
  • 25-10-2017
  • Mathematics
contestada

2x-y=0
3x-2y=-3

x+4y=1
3x+5y=10

3x+3=3y
2x-6y=2

The correct way to do number 22

2xy0 3x2y3 x4y1 3x5y10 3x33y 2x6y2 The correct way to do number 22 class=

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altavistard
altavistard altavistard
  • 25-10-2017
If you mult.  x + y = 1 by -5, you should get -5x - 5y = -5.  In the example shown, the author wrote                               -5x + 5y = -5 (this is incorrect)
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