nicole565 nicole565
  • 19-05-2017
  • Mathematics
contestada

A student solved s system of equations by elimination. Describe and correct the error made in the part of the solution shown.

5x+4y — x3→15x+12y=6

3x+3y — x4→12x+12y=-3

3x+0=9

x=3

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haydwolf1 haydwolf1
  • 19-05-2017
It went wrong in the 2nd step. It doesn't equal -3 it equals positive 3
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